845 lines
33 KiB
C++
845 lines
33 KiB
C++
/*
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* Copyright 2011-2023 Branimir Karadzic. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx/blob/master/LICENSE
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*/
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#include "common.h"
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#include "bgfx_utils.h"
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#include "imgui/imgui.h"
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#include <bgfx/embedded_shader.h>
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// embedded shaders
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#include "vs_metaballs.bin.h"
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#include "fs_metaballs.bin.h"
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namespace
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{
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static const bgfx::EmbeddedShader s_embeddedShaders[] =
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{
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BGFX_EMBEDDED_SHADER(vs_metaballs),
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BGFX_EMBEDDED_SHADER(fs_metaballs),
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BGFX_EMBEDDED_SHADER_END()
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};
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struct PosNormalColorVertex
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{
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float m_pos[3];
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float m_normal[3];
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uint32_t m_abgr;
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static void init()
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{
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ms_layout
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.begin()
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.add(bgfx::Attrib::Position, 3, bgfx::AttribType::Float)
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.add(bgfx::Attrib::Normal, 3, bgfx::AttribType::Float)
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.add(bgfx::Attrib::Color0, 4, bgfx::AttribType::Uint8, true)
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.end();
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};
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static bgfx::VertexLayout ms_layout;
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};
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bgfx::VertexLayout PosNormalColorVertex::ms_layout;
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struct Grid
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{
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Grid()
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: m_val(0.0f)
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{
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m_normal[0] = 0.0f;
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m_normal[1] = 0.0f;
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m_normal[2] = 0.0f;
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}
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float m_val;
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float m_normal[3];
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};
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// Reference(s):
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// - Polygonising a scalar field
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// https://web.archive.org/web/20181127124338/http://paulbourke.net/geometry/polygonise/
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static const uint16_t s_edges[256] =
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{
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0x000, 0x109, 0x203, 0x30a, 0x406, 0x50f, 0x605, 0x70c,
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0x80c, 0x905, 0xa0f, 0xb06, 0xc0a, 0xd03, 0xe09, 0xf00,
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0x190, 0x099, 0x393, 0x29a, 0x596, 0x49f, 0x795, 0x69c,
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0x99c, 0x895, 0xb9f, 0xa96, 0xd9a, 0xc93, 0xf99, 0xe90,
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0x230, 0x339, 0x033, 0x13a, 0x636, 0x73f, 0x435, 0x53c,
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0xa3c, 0xb35, 0x83f, 0x936, 0xe3a, 0xf33, 0xc39, 0xd30,
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0x3a0, 0x2a9, 0x1a3, 0x0aa, 0x7a6, 0x6af, 0x5a5, 0x4ac,
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0xbac, 0xaa5, 0x9af, 0x8a6, 0xfaa, 0xea3, 0xda9, 0xca0,
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0x460, 0x569, 0x663, 0x76a, 0x66 , 0x16f, 0x265, 0x36c,
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0xc6c, 0xd65, 0xe6f, 0xf66, 0x86a, 0x963, 0xa69, 0xb60,
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0x5f0, 0x4f9, 0x7f3, 0x6fa, 0x1f6, 0x0ff, 0x3f5, 0x2fc,
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0xdfc, 0xcf5, 0xfff, 0xef6, 0x9fa, 0x8f3, 0xbf9, 0xaf0,
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0x650, 0x759, 0x453, 0x55a, 0x256, 0x35f, 0x055, 0x15c,
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0xe5c, 0xf55, 0xc5f, 0xd56, 0xa5a, 0xb53, 0x859, 0x950,
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0x7c0, 0x6c9, 0x5c3, 0x4ca, 0x3c6, 0x2cf, 0x1c5, 0x0cc,
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0xfcc, 0xec5, 0xdcf, 0xcc6, 0xbca, 0xac3, 0x9c9, 0x8c0,
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0x8c0, 0x9c9, 0xac3, 0xbca, 0xcc6, 0xdcf, 0xec5, 0xfcc,
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0x0cc, 0x1c5, 0x2cf, 0x3c6, 0x4ca, 0x5c3, 0x6c9, 0x7c0,
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0x950, 0x859, 0xb53, 0xa5a, 0xd56, 0xc5f, 0xf55, 0xe5c,
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0x15c, 0x55 , 0x35f, 0x256, 0x55a, 0x453, 0x759, 0x650,
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0xaf0, 0xbf9, 0x8f3, 0x9fa, 0xef6, 0xfff, 0xcf5, 0xdfc,
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0x2fc, 0x3f5, 0x0ff, 0x1f6, 0x6fa, 0x7f3, 0x4f9, 0x5f0,
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0xb60, 0xa69, 0x963, 0x86a, 0xf66, 0xe6f, 0xd65, 0xc6c,
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0x36c, 0x265, 0x16f, 0x066, 0x76a, 0x663, 0x569, 0x460,
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0xca0, 0xda9, 0xea3, 0xfaa, 0x8a6, 0x9af, 0xaa5, 0xbac,
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0x4ac, 0x5a5, 0x6af, 0x7a6, 0x0aa, 0x1a3, 0x2a9, 0x3a0,
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0xd30, 0xc39, 0xf33, 0xe3a, 0x936, 0x83f, 0xb35, 0xa3c,
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0x53c, 0x435, 0x73f, 0x636, 0x13a, 0x033, 0x339, 0x230,
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0xe90, 0xf99, 0xc93, 0xd9a, 0xa96, 0xb9f, 0x895, 0x99c,
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0x69c, 0x795, 0x49f, 0x596, 0x29a, 0x393, 0x099, 0x190,
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0xf00, 0xe09, 0xd03, 0xc0a, 0xb06, 0xa0f, 0x905, 0x80c,
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0x70c, 0x605, 0x50f, 0x406, 0x30a, 0x203, 0x109, 0x000,
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};
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static const int8_t s_indices[256][16] =
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{
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{ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 0, 8, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 0, 1, 9, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 1, 8, 3, 9, 8, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 1, 2, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 0, 8, 3, 1, 2, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 9, 2, 10, 0, 2, 9, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 2, 8, 3, 2, 10, 8, 10, 9, 8, -1, -1, -1, -1, -1, -1, -1 },
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{ 3, 11, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 0, 11, 2, 8, 11, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 1, 9, 0, 2, 3, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 1, 11, 2, 1, 9, 11, 9, 8, 11, -1, -1, -1, -1, -1, -1, -1 },
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{ 3, 10, 1, 11, 10, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 0, 10, 1, 0, 8, 10, 8, 11, 10, -1, -1, -1, -1, -1, -1, -1 },
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{ 3, 9, 0, 3, 11, 9, 11, 10, 9, -1, -1, -1, -1, -1, -1, -1 },
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{ 9, 8, 10, 10, 8, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 4, 7, 8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 4, 3, 0, 7, 3, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 0, 1, 9, 8, 4, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 4, 1, 9, 4, 7, 1, 7, 3, 1, -1, -1, -1, -1, -1, -1, -1 },
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{ 1, 2, 10, 8, 4, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 3, 4, 7, 3, 0, 4, 1, 2, 10, -1, -1, -1, -1, -1, -1, -1 },
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{ 9, 2, 10, 9, 0, 2, 8, 4, 7, -1, -1, -1, -1, -1, -1, -1 },
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{ 2, 10, 9, 2, 9, 7, 2, 7, 3, 7, 9, 4, -1, -1, -1, -1 },
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{ 8, 4, 7, 3, 11, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 11, 4, 7, 11, 2, 4, 2, 0, 4, -1, -1, -1, -1, -1, -1, -1 },
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{ 9, 0, 1, 8, 4, 7, 2, 3, 11, -1, -1, -1, -1, -1, -1, -1 },
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{ 4, 7, 11, 9, 4, 11, 9, 11, 2, 9, 2, 1, -1, -1, -1, -1 },
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{ 3, 10, 1, 3, 11, 10, 7, 8, 4, -1, -1, -1, -1, -1, -1, -1 },
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{ 1, 11, 10, 1, 4, 11, 1, 0, 4, 7, 11, 4, -1, -1, -1, -1 },
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{ 4, 7, 8, 9, 0, 11, 9, 11, 10, 11, 0, 3, -1, -1, -1, -1 },
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{ 4, 7, 11, 4, 11, 9, 9, 11, 10, -1, -1, -1, -1, -1, -1, -1 },
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{ 9, 5, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 9, 5, 4, 0, 8, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 0, 5, 4, 1, 5, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 8, 5, 4, 8, 3, 5, 3, 1, 5, -1, -1, -1, -1, -1, -1, -1 },
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{ 1, 2, 10, 9, 5, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 3, 0, 8, 1, 2, 10, 4, 9, 5, -1, -1, -1, -1, -1, -1, -1 },
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{ 5, 2, 10, 5, 4, 2, 4, 0, 2, -1, -1, -1, -1, -1, -1, -1 },
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{ 2, 10, 5, 3, 2, 5, 3, 5, 4, 3, 4, 8, -1, -1, -1, -1 },
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{ 9, 5, 4, 2, 3, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 0, 11, 2, 0, 8, 11, 4, 9, 5, -1, -1, -1, -1, -1, -1, -1 },
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{ 0, 5, 4, 0, 1, 5, 2, 3, 11, -1, -1, -1, -1, -1, -1, -1 },
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{ 2, 1, 5, 2, 5, 8, 2, 8, 11, 4, 8, 5, -1, -1, -1, -1 },
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{ 10, 3, 11, 10, 1, 3, 9, 5, 4, -1, -1, -1, -1, -1, -1, -1 },
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{ 4, 9, 5, 0, 8, 1, 8, 10, 1, 8, 11, 10, -1, -1, -1, -1 },
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{ 5, 4, 0, 5, 0, 11, 5, 11, 10, 11, 0, 3, -1, -1, -1, -1 },
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{ 5, 4, 8, 5, 8, 10, 10, 8, 11, -1, -1, -1, -1, -1, -1, -1 },
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{ 9, 7, 8, 5, 7, 9, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 9, 3, 0, 9, 5, 3, 5, 7, 3, -1, -1, -1, -1, -1, -1, -1 },
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{ 0, 7, 8, 0, 1, 7, 1, 5, 7, -1, -1, -1, -1, -1, -1, -1 },
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{ 1, 5, 3, 3, 5, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 9, 7, 8, 9, 5, 7, 10, 1, 2, -1, -1, -1, -1, -1, -1, -1 },
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{ 10, 1, 2, 9, 5, 0, 5, 3, 0, 5, 7, 3, -1, -1, -1, -1 },
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{ 8, 0, 2, 8, 2, 5, 8, 5, 7, 10, 5, 2, -1, -1, -1, -1 },
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{ 2, 10, 5, 2, 5, 3, 3, 5, 7, -1, -1, -1, -1, -1, -1, -1 },
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{ 7, 9, 5, 7, 8, 9, 3, 11, 2, -1, -1, -1, -1, -1, -1, -1 },
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{ 9, 5, 7, 9, 7, 2, 9, 2, 0, 2, 7, 11, -1, -1, -1, -1 },
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{ 2, 3, 11, 0, 1, 8, 1, 7, 8, 1, 5, 7, -1, -1, -1, -1 },
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{ 11, 2, 1, 11, 1, 7, 7, 1, 5, -1, -1, -1, -1, -1, -1, -1 },
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{ 9, 5, 8, 8, 5, 7, 10, 1, 3, 10, 3, 11, -1, -1, -1, -1 },
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{ 5, 7, 0, 5, 0, 9, 7, 11, 0, 1, 0, 10, 11, 10, 0, -1 },
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{ 11, 10, 0, 11, 0, 3, 10, 5, 0, 8, 0, 7, 5, 7, 0, -1 },
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{ 11, 10, 5, 7, 11, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 10, 6, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 0, 8, 3, 5, 10, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 9, 0, 1, 5, 10, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 1, 8, 3, 1, 9, 8, 5, 10, 6, -1, -1, -1, -1, -1, -1, -1 },
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{ 1, 6, 5, 2, 6, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 1, 6, 5, 1, 2, 6, 3, 0, 8, -1, -1, -1, -1, -1, -1, -1 },
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{ 9, 6, 5, 9, 0, 6, 0, 2, 6, -1, -1, -1, -1, -1, -1, -1 },
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{ 5, 9, 8, 5, 8, 2, 5, 2, 6, 3, 2, 8, -1, -1, -1, -1 },
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{ 2, 3, 11, 10, 6, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 11, 0, 8, 11, 2, 0, 10, 6, 5, -1, -1, -1, -1, -1, -1, -1 },
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{ 0, 1, 9, 2, 3, 11, 5, 10, 6, -1, -1, -1, -1, -1, -1, -1 },
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{ 5, 10, 6, 1, 9, 2, 9, 11, 2, 9, 8, 11, -1, -1, -1, -1 },
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{ 6, 3, 11, 6, 5, 3, 5, 1, 3, -1, -1, -1, -1, -1, -1, -1 },
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{ 0, 8, 11, 0, 11, 5, 0, 5, 1, 5, 11, 6, -1, -1, -1, -1 },
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{ 3, 11, 6, 0, 3, 6, 0, 6, 5, 0, 5, 9, -1, -1, -1, -1 },
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{ 6, 5, 9, 6, 9, 11, 11, 9, 8, -1, -1, -1, -1, -1, -1, -1 },
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{ 5, 10, 6, 4, 7, 8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 4, 3, 0, 4, 7, 3, 6, 5, 10, -1, -1, -1, -1, -1, -1, -1 },
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{ 1, 9, 0, 5, 10, 6, 8, 4, 7, -1, -1, -1, -1, -1, -1, -1 },
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{ 10, 6, 5, 1, 9, 7, 1, 7, 3, 7, 9, 4, -1, -1, -1, -1 },
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{ 6, 1, 2, 6, 5, 1, 4, 7, 8, -1, -1, -1, -1, -1, -1, -1 },
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{ 1, 2, 5, 5, 2, 6, 3, 0, 4, 3, 4, 7, -1, -1, -1, -1 },
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{ 8, 4, 7, 9, 0, 5, 0, 6, 5, 0, 2, 6, -1, -1, -1, -1 },
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{ 7, 3, 9, 7, 9, 4, 3, 2, 9, 5, 9, 6, 2, 6, 9, -1 },
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{ 3, 11, 2, 7, 8, 4, 10, 6, 5, -1, -1, -1, -1, -1, -1, -1 },
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{ 5, 10, 6, 4, 7, 2, 4, 2, 0, 2, 7, 11, -1, -1, -1, -1 },
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{ 0, 1, 9, 4, 7, 8, 2, 3, 11, 5, 10, 6, -1, -1, -1, -1 },
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{ 9, 2, 1, 9, 11, 2, 9, 4, 11, 7, 11, 4, 5, 10, 6, -1 },
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{ 8, 4, 7, 3, 11, 5, 3, 5, 1, 5, 11, 6, -1, -1, -1, -1 },
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{ 5, 1, 11, 5, 11, 6, 1, 0, 11, 7, 11, 4, 0, 4, 11, -1 },
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{ 0, 5, 9, 0, 6, 5, 0, 3, 6, 11, 6, 3, 8, 4, 7, -1 },
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{ 6, 5, 9, 6, 9, 11, 4, 7, 9, 7, 11, 9, -1, -1, -1, -1 },
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{ 10, 4, 9, 6, 4, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 4, 10, 6, 4, 9, 10, 0, 8, 3, -1, -1, -1, -1, -1, -1, -1 },
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{ 10, 0, 1, 10, 6, 0, 6, 4, 0, -1, -1, -1, -1, -1, -1, -1 },
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{ 8, 3, 1, 8, 1, 6, 8, 6, 4, 6, 1, 10, -1, -1, -1, -1 },
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{ 1, 4, 9, 1, 2, 4, 2, 6, 4, -1, -1, -1, -1, -1, -1, -1 },
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{ 3, 0, 8, 1, 2, 9, 2, 4, 9, 2, 6, 4, -1, -1, -1, -1 },
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{ 0, 2, 4, 4, 2, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 8, 3, 2, 8, 2, 4, 4, 2, 6, -1, -1, -1, -1, -1, -1, -1 },
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{ 10, 4, 9, 10, 6, 4, 11, 2, 3, -1, -1, -1, -1, -1, -1, -1 },
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{ 0, 8, 2, 2, 8, 11, 4, 9, 10, 4, 10, 6, -1, -1, -1, -1 },
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{ 3, 11, 2, 0, 1, 6, 0, 6, 4, 6, 1, 10, -1, -1, -1, -1 },
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{ 6, 4, 1, 6, 1, 10, 4, 8, 1, 2, 1, 11, 8, 11, 1, -1 },
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{ 9, 6, 4, 9, 3, 6, 9, 1, 3, 11, 6, 3, -1, -1, -1, -1 },
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{ 8, 11, 1, 8, 1, 0, 11, 6, 1, 9, 1, 4, 6, 4, 1, -1 },
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{ 3, 11, 6, 3, 6, 0, 0, 6, 4, -1, -1, -1, -1, -1, -1, -1 },
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{ 6, 4, 8, 11, 6, 8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
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{ 7, 10, 6, 7, 8, 10, 8, 9, 10, -1, -1, -1, -1, -1, -1, -1 },
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{ 0, 7, 3, 0, 10, 7, 0, 9, 10, 6, 7, 10, -1, -1, -1, -1 },
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{ 10, 6, 7, 1, 10, 7, 1, 7, 8, 1, 8, 0, -1, -1, -1, -1 },
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{ 10, 6, 7, 10, 7, 1, 1, 7, 3, -1, -1, -1, -1, -1, -1, -1 },
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{ 1, 2, 6, 1, 6, 8, 1, 8, 9, 8, 6, 7, -1, -1, -1, -1 },
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{ 2, 6, 9, 2, 9, 1, 6, 7, 9, 0, 9, 3, 7, 3, 9, -1 },
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{ 7, 8, 0, 7, 0, 6, 6, 0, 2, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 7, 3, 2, 6, 7, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 2, 3, 11, 10, 6, 8, 10, 8, 9, 8, 6, 7, -1, -1, -1, -1 },
|
|
{ 2, 0, 7, 2, 7, 11, 0, 9, 7, 6, 7, 10, 9, 10, 7, -1 },
|
|
{ 1, 8, 0, 1, 7, 8, 1, 10, 7, 6, 7, 10, 2, 3, 11, -1 },
|
|
{ 11, 2, 1, 11, 1, 7, 10, 6, 1, 6, 7, 1, -1, -1, -1, -1 },
|
|
{ 8, 9, 6, 8, 6, 7, 9, 1, 6, 11, 6, 3, 1, 3, 6, -1 },
|
|
{ 0, 9, 1, 11, 6, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 7, 8, 0, 7, 0, 6, 3, 11, 0, 11, 6, 0, -1, -1, -1, -1 },
|
|
{ 7, 11, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 7, 6, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 3, 0, 8, 11, 7, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 0, 1, 9, 11, 7, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 8, 1, 9, 8, 3, 1, 11, 7, 6, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 10, 1, 2, 6, 11, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 1, 2, 10, 3, 0, 8, 6, 11, 7, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 2, 9, 0, 2, 10, 9, 6, 11, 7, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 6, 11, 7, 2, 10, 3, 10, 8, 3, 10, 9, 8, -1, -1, -1, -1 },
|
|
{ 7, 2, 3, 6, 2, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 7, 0, 8, 7, 6, 0, 6, 2, 0, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 2, 7, 6, 2, 3, 7, 0, 1, 9, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 1, 6, 2, 1, 8, 6, 1, 9, 8, 8, 7, 6, -1, -1, -1, -1 },
|
|
{ 10, 7, 6, 10, 1, 7, 1, 3, 7, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 10, 7, 6, 1, 7, 10, 1, 8, 7, 1, 0, 8, -1, -1, -1, -1 },
|
|
{ 0, 3, 7, 0, 7, 10, 0, 10, 9, 6, 10, 7, -1, -1, -1, -1 },
|
|
{ 7, 6, 10, 7, 10, 8, 8, 10, 9, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 6, 8, 4, 11, 8, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 3, 6, 11, 3, 0, 6, 0, 4, 6, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 8, 6, 11, 8, 4, 6, 9, 0, 1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 9, 4, 6, 9, 6, 3, 9, 3, 1, 11, 3, 6, -1, -1, -1, -1 },
|
|
{ 6, 8, 4, 6, 11, 8, 2, 10, 1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 1, 2, 10, 3, 0, 11, 0, 6, 11, 0, 4, 6, -1, -1, -1, -1 },
|
|
{ 4, 11, 8, 4, 6, 11, 0, 2, 9, 2, 10, 9, -1, -1, -1, -1 },
|
|
{ 10, 9, 3, 10, 3, 2, 9, 4, 3, 11, 3, 6, 4, 6, 3, -1 },
|
|
{ 8, 2, 3, 8, 4, 2, 4, 6, 2, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 0, 4, 2, 4, 6, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 1, 9, 0, 2, 3, 4, 2, 4, 6, 4, 3, 8, -1, -1, -1, -1 },
|
|
{ 1, 9, 4, 1, 4, 2, 2, 4, 6, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 8, 1, 3, 8, 6, 1, 8, 4, 6, 6, 10, 1, -1, -1, -1, -1 },
|
|
{ 10, 1, 0, 10, 0, 6, 6, 0, 4, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 4, 6, 3, 4, 3, 8, 6, 10, 3, 0, 3, 9, 10, 9, 3, -1 },
|
|
{ 10, 9, 4, 6, 10, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 4, 9, 5, 7, 6, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 0, 8, 3, 4, 9, 5, 11, 7, 6, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 5, 0, 1, 5, 4, 0, 7, 6, 11, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 11, 7, 6, 8, 3, 4, 3, 5, 4, 3, 1, 5, -1, -1, -1, -1 },
|
|
{ 9, 5, 4, 10, 1, 2, 7, 6, 11, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 6, 11, 7, 1, 2, 10, 0, 8, 3, 4, 9, 5, -1, -1, -1, -1 },
|
|
{ 7, 6, 11, 5, 4, 10, 4, 2, 10, 4, 0, 2, -1, -1, -1, -1 },
|
|
{ 3, 4, 8, 3, 5, 4, 3, 2, 5, 10, 5, 2, 11, 7, 6, -1 },
|
|
{ 7, 2, 3, 7, 6, 2, 5, 4, 9, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 9, 5, 4, 0, 8, 6, 0, 6, 2, 6, 8, 7, -1, -1, -1, -1 },
|
|
{ 3, 6, 2, 3, 7, 6, 1, 5, 0, 5, 4, 0, -1, -1, -1, -1 },
|
|
{ 6, 2, 8, 6, 8, 7, 2, 1, 8, 4, 8, 5, 1, 5, 8, -1 },
|
|
{ 9, 5, 4, 10, 1, 6, 1, 7, 6, 1, 3, 7, -1, -1, -1, -1 },
|
|
{ 1, 6, 10, 1, 7, 6, 1, 0, 7, 8, 7, 0, 9, 5, 4, -1 },
|
|
{ 4, 0, 10, 4, 10, 5, 0, 3, 10, 6, 10, 7, 3, 7, 10, -1 },
|
|
{ 7, 6, 10, 7, 10, 8, 5, 4, 10, 4, 8, 10, -1, -1, -1, -1 },
|
|
{ 6, 9, 5, 6, 11, 9, 11, 8, 9, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 3, 6, 11, 0, 6, 3, 0, 5, 6, 0, 9, 5, -1, -1, -1, -1 },
|
|
{ 0, 11, 8, 0, 5, 11, 0, 1, 5, 5, 6, 11, -1, -1, -1, -1 },
|
|
{ 6, 11, 3, 6, 3, 5, 5, 3, 1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 1, 2, 10, 9, 5, 11, 9, 11, 8, 11, 5, 6, -1, -1, -1, -1 },
|
|
{ 0, 11, 3, 0, 6, 11, 0, 9, 6, 5, 6, 9, 1, 2, 10, -1 },
|
|
{ 11, 8, 5, 11, 5, 6, 8, 0, 5, 10, 5, 2, 0, 2, 5, -1 },
|
|
{ 6, 11, 3, 6, 3, 5, 2, 10, 3, 10, 5, 3, -1, -1, -1, -1 },
|
|
{ 5, 8, 9, 5, 2, 8, 5, 6, 2, 3, 8, 2, -1, -1, -1, -1 },
|
|
{ 9, 5, 6, 9, 6, 0, 0, 6, 2, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 1, 5, 8, 1, 8, 0, 5, 6, 8, 3, 8, 2, 6, 2, 8, -1 },
|
|
{ 1, 5, 6, 2, 1, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 1, 3, 6, 1, 6, 10, 3, 8, 6, 5, 6, 9, 8, 9, 6, -1 },
|
|
{ 10, 1, 0, 10, 0, 6, 9, 5, 0, 5, 6, 0, -1, -1, -1, -1 },
|
|
{ 0, 3, 8, 5, 6, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 10, 5, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 11, 5, 10, 7, 5, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 11, 5, 10, 11, 7, 5, 8, 3, 0, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 5, 11, 7, 5, 10, 11, 1, 9, 0, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 10, 7, 5, 10, 11, 7, 9, 8, 1, 8, 3, 1, -1, -1, -1, -1 },
|
|
{ 11, 1, 2, 11, 7, 1, 7, 5, 1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 0, 8, 3, 1, 2, 7, 1, 7, 5, 7, 2, 11, -1, -1, -1, -1 },
|
|
{ 9, 7, 5, 9, 2, 7, 9, 0, 2, 2, 11, 7, -1, -1, -1, -1 },
|
|
{ 7, 5, 2, 7, 2, 11, 5, 9, 2, 3, 2, 8, 9, 8, 2, -1 },
|
|
{ 2, 5, 10, 2, 3, 5, 3, 7, 5, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 8, 2, 0, 8, 5, 2, 8, 7, 5, 10, 2, 5, -1, -1, -1, -1 },
|
|
{ 9, 0, 1, 5, 10, 3, 5, 3, 7, 3, 10, 2, -1, -1, -1, -1 },
|
|
{ 9, 8, 2, 9, 2, 1, 8, 7, 2, 10, 2, 5, 7, 5, 2, -1 },
|
|
{ 1, 3, 5, 3, 7, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 0, 8, 7, 0, 7, 1, 1, 7, 5, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 9, 0, 3, 9, 3, 5, 5, 3, 7, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 9, 8, 7, 5, 9, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 5, 8, 4, 5, 10, 8, 10, 11, 8, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 5, 0, 4, 5, 11, 0, 5, 10, 11, 11, 3, 0, -1, -1, -1, -1 },
|
|
{ 0, 1, 9, 8, 4, 10, 8, 10, 11, 10, 4, 5, -1, -1, -1, -1 },
|
|
{ 10, 11, 4, 10, 4, 5, 11, 3, 4, 9, 4, 1, 3, 1, 4, -1 },
|
|
{ 2, 5, 1, 2, 8, 5, 2, 11, 8, 4, 5, 8, -1, -1, -1, -1 },
|
|
{ 0, 4, 11, 0, 11, 3, 4, 5, 11, 2, 11, 1, 5, 1, 11, -1 },
|
|
{ 0, 2, 5, 0, 5, 9, 2, 11, 5, 4, 5, 8, 11, 8, 5, -1 },
|
|
{ 9, 4, 5, 2, 11, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 2, 5, 10, 3, 5, 2, 3, 4, 5, 3, 8, 4, -1, -1, -1, -1 },
|
|
{ 5, 10, 2, 5, 2, 4, 4, 2, 0, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 3, 10, 2, 3, 5, 10, 3, 8, 5, 4, 5, 8, 0, 1, 9, -1 },
|
|
{ 5, 10, 2, 5, 2, 4, 1, 9, 2, 9, 4, 2, -1, -1, -1, -1 },
|
|
{ 8, 4, 5, 8, 5, 3, 3, 5, 1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 0, 4, 5, 1, 0, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 8, 4, 5, 8, 5, 3, 9, 0, 5, 0, 3, 5, -1, -1, -1, -1 },
|
|
{ 9, 4, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 4, 11, 7, 4, 9, 11, 9, 10, 11, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 0, 8, 3, 4, 9, 7, 9, 11, 7, 9, 10, 11, -1, -1, -1, -1 },
|
|
{ 1, 10, 11, 1, 11, 4, 1, 4, 0, 7, 4, 11, -1, -1, -1, -1 },
|
|
{ 3, 1, 4, 3, 4, 8, 1, 10, 4, 7, 4, 11, 10, 11, 4, -1 },
|
|
{ 4, 11, 7, 9, 11, 4, 9, 2, 11, 9, 1, 2, -1, -1, -1, -1 },
|
|
{ 9, 7, 4, 9, 11, 7, 9, 1, 11, 2, 11, 1, 0, 8, 3, -1 },
|
|
{ 11, 7, 4, 11, 4, 2, 2, 4, 0, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 11, 7, 4, 11, 4, 2, 8, 3, 4, 3, 2, 4, -1, -1, -1, -1 },
|
|
{ 2, 9, 10, 2, 7, 9, 2, 3, 7, 7, 4, 9, -1, -1, -1, -1 },
|
|
{ 9, 10, 7, 9, 7, 4, 10, 2, 7, 8, 7, 0, 2, 0, 7, -1 },
|
|
{ 3, 7, 10, 3, 10, 2, 7, 4, 10, 1, 10, 0, 4, 0, 10, -1 },
|
|
{ 1, 10, 2, 8, 7, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 4, 9, 1, 4, 1, 7, 7, 1, 3, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 4, 9, 1, 4, 1, 7, 0, 8, 1, 8, 7, 1, -1, -1, -1, -1 },
|
|
{ 4, 0, 3, 7, 4, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 4, 8, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 9, 10, 8, 10, 11, 8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 3, 0, 9, 3, 9, 11, 11, 9, 10, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 0, 1, 10, 0, 10, 8, 8, 10, 11, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 3, 1, 10, 11, 3, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 1, 2, 11, 1, 11, 9, 9, 11, 8, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 3, 0, 9, 3, 9, 11, 1, 2, 9, 2, 11, 9, -1, -1, -1, -1 },
|
|
{ 0, 2, 11, 8, 0, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 3, 2, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 2, 3, 8, 2, 8, 10, 10, 8, 9, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 9, 10, 2, 0, 9, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 2, 3, 8, 2, 8, 10, 0, 1, 8, 1, 10, 8, -1, -1, -1, -1 },
|
|
{ 1, 10, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 1, 3, 8, 9, 1, 8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 0, 9, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ 0, 3, 8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
{ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
|
|
};
|
|
|
|
static const float s_cube[8][3] =
|
|
{
|
|
{ 0.0f, 1.0f, 1.0f }, // 0
|
|
{ 1.0f, 1.0f, 1.0f }, // 1
|
|
{ 1.0f, 1.0f, 0.0f }, // 2
|
|
{ 0.0f, 1.0f, 0.0f }, // 3
|
|
{ 0.0f, 0.0f, 1.0f }, // 4
|
|
{ 1.0f, 0.0f, 1.0f }, // 5
|
|
{ 1.0f, 0.0f, 0.0f }, // 6
|
|
{ 0.0f, 0.0f, 0.0f }, // 7
|
|
};
|
|
|
|
float vertLerp(float* _result, float _iso, uint32_t _idx0, float _v0, uint32_t _idx1, float _v1)
|
|
{
|
|
const float* edge0 = s_cube[_idx0];
|
|
const float* edge1 = s_cube[_idx1];
|
|
|
|
if (bx::abs(_iso-_v1) < 0.00001f)
|
|
{
|
|
_result[0] = edge1[0];
|
|
_result[1] = edge1[1];
|
|
_result[2] = edge1[2];
|
|
return 1.0f;
|
|
}
|
|
|
|
if (bx::abs(_iso-_v0) < 0.00001f
|
|
|| bx::abs(_v0-_v1) < 0.00001f)
|
|
{
|
|
_result[0] = edge0[0];
|
|
_result[1] = edge0[1];
|
|
_result[2] = edge0[2];
|
|
return 0.0f;
|
|
}
|
|
|
|
float lerp = (_iso - _v0) / (_v1 - _v0);
|
|
_result[0] = edge0[0] + lerp * (edge1[0] - edge0[0]);
|
|
_result[1] = edge0[1] + lerp * (edge1[1] - edge0[1]);
|
|
_result[2] = edge0[2] + lerp * (edge1[2] - edge0[2]);
|
|
|
|
return lerp;
|
|
}
|
|
|
|
uint32_t triangulate(
|
|
uint8_t* _result
|
|
, uint32_t _stride
|
|
, const float* _rgb
|
|
, const float* _xyz
|
|
, const Grid* _val[8]
|
|
, float _iso
|
|
, float _scale
|
|
)
|
|
{
|
|
uint8_t cubeindex = 0;
|
|
cubeindex |= (_val[0]->m_val < _iso) ? 0x01 : 0;
|
|
cubeindex |= (_val[1]->m_val < _iso) ? 0x02 : 0;
|
|
cubeindex |= (_val[2]->m_val < _iso) ? 0x04 : 0;
|
|
cubeindex |= (_val[3]->m_val < _iso) ? 0x08 : 0;
|
|
cubeindex |= (_val[4]->m_val < _iso) ? 0x10 : 0;
|
|
cubeindex |= (_val[5]->m_val < _iso) ? 0x20 : 0;
|
|
cubeindex |= (_val[6]->m_val < _iso) ? 0x40 : 0;
|
|
cubeindex |= (_val[7]->m_val < _iso) ? 0x80 : 0;
|
|
|
|
if (0 == s_edges[cubeindex])
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
float verts[12][6];
|
|
uint16_t flags = s_edges[cubeindex];
|
|
|
|
for (uint32_t ii = 0; ii < 12; ++ii)
|
|
{
|
|
if (flags & (1<<ii) )
|
|
{
|
|
uint32_t idx0 = ii&7;
|
|
uint32_t idx1 = "\x1\x2\x3\x0\x5\x6\x7\x4\x4\x5\x6\x7"[ii];
|
|
float* vertex = verts[ii];
|
|
float lerp = vertLerp(vertex, _iso, idx0, _val[idx0]->m_val, idx1, _val[idx1]->m_val);
|
|
|
|
const float* na = _val[idx0]->m_normal;
|
|
const float* nb = _val[idx1]->m_normal;
|
|
vertex[3] = na[0] + lerp * (nb[0] - na[0]);
|
|
vertex[4] = na[1] + lerp * (nb[1] - na[1]);
|
|
vertex[5] = na[2] + lerp * (nb[2] - na[2]);
|
|
}
|
|
}
|
|
|
|
const float dr = _rgb[3] - _rgb[0];
|
|
const float dg = _rgb[4] - _rgb[1];
|
|
const float db = _rgb[5] - _rgb[2];
|
|
|
|
uint32_t num = 0;
|
|
const int8_t* indices = s_indices[cubeindex];
|
|
for (uint32_t ii = 0; indices[ii] != -1; ++ii)
|
|
{
|
|
const float* vertex = verts[uint8_t(indices[ii])];
|
|
|
|
float* xyz = (float*)_result;
|
|
xyz[0] = _xyz[0] + vertex[0]*_scale;
|
|
xyz[1] = _xyz[1] + vertex[1]*_scale;
|
|
xyz[2] = _xyz[2] + vertex[2]*_scale;
|
|
|
|
xyz[3] = vertex[3]*_scale;
|
|
xyz[4] = vertex[4]*_scale;
|
|
xyz[5] = vertex[5]*_scale;
|
|
|
|
uint32_t rr = uint8_t( (_rgb[0] + vertex[0]*dr)*255.0f);
|
|
uint32_t gg = uint8_t( (_rgb[1] + vertex[1]*dg)*255.0f);
|
|
uint32_t bb = uint8_t( (_rgb[2] + vertex[2]*db)*255.0f);
|
|
|
|
uint32_t* abgr = (uint32_t*)&_result[24];
|
|
*abgr = 0xff000000
|
|
| (bb<<16)
|
|
| (gg<<8)
|
|
| rr
|
|
;
|
|
|
|
_result += _stride;
|
|
++num;
|
|
}
|
|
|
|
return num;
|
|
}
|
|
|
|
constexpr uint32_t kMaxDims = 32;
|
|
constexpr float kMaxDimsF = float(kMaxDims);
|
|
|
|
class ExampleMetaballs : public entry::AppI
|
|
{
|
|
public:
|
|
ExampleMetaballs(const char* _name, const char* _description, const char* _url)
|
|
: entry::AppI(_name, _description, _url)
|
|
{
|
|
}
|
|
|
|
void init(int32_t _argc, const char* const* _argv, uint32_t _width, uint32_t _height) override
|
|
{
|
|
Args args(_argc, _argv);
|
|
|
|
m_width = _width;
|
|
m_height = _height;
|
|
m_debug = BGFX_DEBUG_NONE;
|
|
m_reset = BGFX_RESET_VSYNC;
|
|
|
|
bgfx::Init init;
|
|
init.type = args.m_type;
|
|
init.vendorId = args.m_pciId;
|
|
init.platformData.nwh = entry::getNativeWindowHandle(entry::kDefaultWindowHandle);
|
|
init.platformData.ndt = entry::getNativeDisplayHandle();
|
|
init.resolution.width = m_width;
|
|
init.resolution.height = m_height;
|
|
init.resolution.reset = m_reset;
|
|
bgfx::init(init);
|
|
|
|
// Enable debug text.
|
|
bgfx::setDebug(m_debug);
|
|
|
|
// Set view 0 clear state.
|
|
bgfx::setViewClear(0
|
|
, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
|
|
, 0x303030ff
|
|
, 1.0f
|
|
, 0
|
|
);
|
|
|
|
// Create vertex stream declaration.
|
|
PosNormalColorVertex::init();
|
|
|
|
bgfx::RendererType::Enum type = bgfx::getRendererType();
|
|
|
|
bgfx::ShaderHandle vsh = bgfx::createEmbeddedShader(s_embeddedShaders, type, "vs_metaballs");
|
|
bgfx::ShaderHandle fsh = bgfx::createEmbeddedShader(s_embeddedShaders, type, "fs_metaballs");
|
|
|
|
// Create program from shaders.
|
|
m_program = bgfx::createProgram(vsh, fsh, true /* destroy shaders when program is destroyed */);
|
|
|
|
m_grid = new Grid[kMaxDims*kMaxDims*kMaxDims];
|
|
m_timeOffset = bx::getHPCounter();
|
|
|
|
imguiCreate();
|
|
}
|
|
|
|
int shutdown() override
|
|
{
|
|
imguiDestroy();
|
|
|
|
delete [] m_grid;
|
|
|
|
// Cleanup.
|
|
bgfx::destroy(m_program);
|
|
|
|
// Shutdown bgfx.
|
|
bgfx::shutdown();
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool update() override
|
|
{
|
|
const uint32_t ypitch = kMaxDims;
|
|
const uint32_t zpitch = kMaxDims*kMaxDims;
|
|
|
|
if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
|
|
{
|
|
imguiBeginFrame(m_mouseState.m_mx
|
|
, m_mouseState.m_my
|
|
, (m_mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
|
|
| (m_mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
|
|
| (m_mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
|
|
, m_mouseState.m_mz
|
|
, uint16_t(m_width)
|
|
, uint16_t(m_height)
|
|
);
|
|
|
|
showExampleDialog(this);
|
|
|
|
ImGui::SetNextWindowPos(
|
|
ImVec2(m_width - m_width / 5.0f - 10.0f, 10.0f)
|
|
, ImGuiCond_FirstUseEver
|
|
);
|
|
ImGui::SetNextWindowSize(
|
|
ImVec2(m_width / 5.0f, m_height / 7.0f)
|
|
, ImGuiCond_FirstUseEver
|
|
);
|
|
ImGui::Begin("Settings"
|
|
, NULL
|
|
, 0
|
|
);
|
|
static float iso = 0.75f;
|
|
ImGui::SliderFloat("ISO", &iso, 0.1f, 4.0f);
|
|
|
|
static uint32_t numDims = kMaxDims;
|
|
ImGui::SliderInt("Size", (int*)&numDims, 8, kMaxDims);
|
|
ImGui::End();
|
|
|
|
const float numDimsF = float(numDims);
|
|
const float scale = kMaxDimsF/numDimsF;
|
|
const float invDim = 1.0f/(numDimsF-1.0f);
|
|
|
|
// Set view 0 default viewport.
|
|
bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) );
|
|
|
|
// This dummy draw call is here to make sure that view 0 is cleared
|
|
// if no other draw calls are submitted to view 0.
|
|
bgfx::touch(0);
|
|
|
|
int64_t now = bx::getHPCounter();
|
|
static int64_t last = now;
|
|
const int64_t frameTime = now - last;
|
|
last = now;
|
|
const double freq = double(bx::getHPFrequency() );
|
|
const double toMs = 1000.0/freq;
|
|
float time = (float)( (now - m_timeOffset)/double(bx::getHPFrequency() ) );
|
|
|
|
const bx::Vec3 at = { 0.0f, 0.0f, 0.0f };
|
|
const bx::Vec3 eye = { 0.0f, 0.0f, -50.0f };
|
|
|
|
// Set view and projection matrix for view 0.
|
|
{
|
|
float view[16];
|
|
bx::mtxLookAt(view, eye, at);
|
|
|
|
float proj[16];
|
|
bx::mtxProj(proj, 60.0f, float(m_width)/float(m_height), 0.1f, 100.0f, bgfx::getCaps()->homogeneousDepth);
|
|
bgfx::setViewTransform(0, view, proj);
|
|
|
|
// Set view 0 default viewport.
|
|
bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) );
|
|
}
|
|
|
|
// Stats.
|
|
uint32_t numVertices = 0;
|
|
int64_t profUpdate = 0;
|
|
int64_t profNormal = 0;
|
|
int64_t profTriangulate = 0;
|
|
|
|
// Allocate 32K vertices in transient vertex buffer.
|
|
uint32_t maxVertices = (32<<10);
|
|
bgfx::TransientVertexBuffer tvb;
|
|
bgfx::allocTransientVertexBuffer(&tvb, maxVertices, PosNormalColorVertex::ms_layout);
|
|
|
|
const uint32_t numSpheres = 16;
|
|
float sphere[numSpheres][4];
|
|
for (uint32_t ii = 0; ii < numSpheres; ++ii)
|
|
{
|
|
sphere[ii][0] = bx::sin(time*(ii*0.21f)+ii*0.37f) * (kMaxDimsF * 0.5f - 8.0f);
|
|
sphere[ii][1] = bx::sin(time*(ii*0.37f)+ii*0.67f) * (kMaxDimsF * 0.5f - 8.0f);
|
|
sphere[ii][2] = bx::cos(time*(ii*0.11f)+ii*0.13f) * (kMaxDimsF * 0.5f - 8.0f);
|
|
sphere[ii][3] = 1.0f/(3.0f + (bx::sin(time*(ii*0.13f) )*0.5f+0.5f)*0.9f );
|
|
}
|
|
|
|
profUpdate = bx::getHPCounter();
|
|
|
|
for (uint32_t zz = 0; zz < numDims; ++zz)
|
|
{
|
|
for (uint32_t yy = 0; yy < numDims; ++yy)
|
|
{
|
|
uint32_t offset = (zz*kMaxDims+yy)*kMaxDims;
|
|
|
|
for (uint32_t xx = 0; xx < numDims; ++xx)
|
|
{
|
|
uint32_t xoffset = offset + xx;
|
|
|
|
float dist = 0.0f;
|
|
float prod = 1.0f;
|
|
for (uint32_t ii = 0; ii < numSpheres; ++ii)
|
|
{
|
|
const float* pos = sphere[ii];
|
|
float dx = pos[0] - (-kMaxDimsF*0.5f + float(xx)*scale);
|
|
float dy = pos[1] - (-kMaxDimsF*0.5f + float(yy)*scale);
|
|
float dz = pos[2] - (-kMaxDimsF*0.5f + float(zz)*scale);
|
|
float invR = pos[3];
|
|
float dot = dx*dx + dy*dy + dz*dz;
|
|
dot *= bx::square(invR);
|
|
|
|
dist *= dot;
|
|
dist += prod;
|
|
prod *= dot;
|
|
}
|
|
|
|
m_grid[xoffset].m_val = dist / prod - 1.0f;
|
|
}
|
|
}
|
|
}
|
|
|
|
profUpdate = bx::getHPCounter() - profUpdate;
|
|
|
|
profNormal = bx::getHPCounter();
|
|
|
|
for (uint32_t zz = 1; zz < numDims-1; ++zz)
|
|
{
|
|
for (uint32_t yy = 1; yy < numDims-1; ++yy)
|
|
{
|
|
uint32_t offset = (zz*kMaxDims+yy)*kMaxDims;
|
|
|
|
for (uint32_t xx = 1; xx < numDims-1; ++xx)
|
|
{
|
|
uint32_t xoffset = offset + xx;
|
|
|
|
Grid* grid = m_grid;
|
|
const bx::Vec3 normal =
|
|
{
|
|
grid[xoffset-1 ].m_val - grid[xoffset+1 ].m_val,
|
|
grid[xoffset-ypitch].m_val - grid[xoffset+ypitch].m_val,
|
|
grid[xoffset-zpitch].m_val - grid[xoffset+zpitch].m_val,
|
|
};
|
|
|
|
bx::store(grid[xoffset].m_normal, bx::normalize(normal) );
|
|
}
|
|
}
|
|
}
|
|
|
|
profNormal = bx::getHPCounter() - profNormal;
|
|
|
|
profTriangulate = bx::getHPCounter();
|
|
|
|
PosNormalColorVertex* vertex = (PosNormalColorVertex*)tvb.data;
|
|
|
|
for (uint32_t zz = 0; zz < numDims-1 && numVertices+12 < maxVertices; ++zz)
|
|
{
|
|
float rgb[6];
|
|
rgb[2] = zz*invDim;
|
|
rgb[5] = (zz+1)*invDim;
|
|
|
|
for (uint32_t yy = 0; yy < numDims-1 && numVertices+12 < maxVertices; ++yy)
|
|
{
|
|
uint32_t offset = (zz*kMaxDims+yy)*kMaxDims;
|
|
|
|
rgb[1] = yy*invDim;
|
|
rgb[4] = (yy+1)*invDim;
|
|
|
|
for (uint32_t xx = 0; xx < numDims-1 && numVertices+12 < maxVertices; ++xx)
|
|
{
|
|
uint32_t xoffset = offset + xx;
|
|
|
|
rgb[0] = xx*invDim;
|
|
rgb[3] = (xx+1)*invDim;
|
|
|
|
float pos[3] =
|
|
{
|
|
-kMaxDimsF*0.5f + float(xx)*scale,
|
|
-kMaxDimsF*0.5f + float(yy)*scale,
|
|
-kMaxDimsF*0.5f + float(zz)*scale,
|
|
};
|
|
|
|
const Grid* grid = m_grid;
|
|
const Grid* val[8] = {
|
|
&grid[xoffset+zpitch+ypitch ],
|
|
&grid[xoffset+zpitch+ypitch+1],
|
|
&grid[xoffset+ypitch+1 ],
|
|
&grid[xoffset+ypitch ],
|
|
&grid[xoffset+zpitch ],
|
|
&grid[xoffset+zpitch+1 ],
|
|
&grid[xoffset+1 ],
|
|
&grid[xoffset ],
|
|
};
|
|
|
|
uint32_t num = triangulate(
|
|
(uint8_t*)vertex
|
|
, PosNormalColorVertex::ms_layout.getStride()
|
|
, rgb
|
|
, pos
|
|
, val
|
|
, iso
|
|
, scale
|
|
);
|
|
vertex += num;
|
|
numVertices += num;
|
|
}
|
|
}
|
|
}
|
|
|
|
profTriangulate = bx::getHPCounter() - profTriangulate;
|
|
|
|
float mtx[16];
|
|
bx::mtxRotateXY(mtx, time*0.67f, time);
|
|
|
|
// Set model matrix for rendering.
|
|
bgfx::setTransform(mtx);
|
|
|
|
// Set vertex and index buffer.
|
|
bgfx::setVertexBuffer(0, &tvb, 0, numVertices);
|
|
|
|
// Set render states.
|
|
bgfx::setState(BGFX_STATE_DEFAULT);
|
|
|
|
// Submit primitive for rendering to view 0.
|
|
bgfx::submit(0, m_program);
|
|
|
|
// Display stats.
|
|
ImGui::SetNextWindowPos(
|
|
ImVec2(m_width - m_width / 5.0f - 10.0f, m_height / 7.0f + 30.0f)
|
|
, ImGuiCond_FirstUseEver
|
|
);
|
|
ImGui::SetNextWindowSize(
|
|
ImVec2(m_width / 5.0f, m_height / 4.0f)
|
|
, ImGuiCond_FirstUseEver
|
|
);
|
|
ImGui::Begin("Stats"
|
|
, NULL
|
|
, 0
|
|
);
|
|
|
|
ImGui::Text("Num vertices:"); ImGui::SameLine(100); ImGui::Text("%5d (%6.4f%%)", numVertices, float(numVertices)/maxVertices * 100);
|
|
ImGui::Text("Update:"); ImGui::SameLine(100); ImGui::Text("% 7.3f[ms]", double(profUpdate)*toMs);
|
|
ImGui::Text("Calc normals:"); ImGui::SameLine(100); ImGui::Text("% 7.3f[ms]", double(profNormal)*toMs);
|
|
ImGui::Text("Triangulate:"); ImGui::SameLine(100); ImGui::Text("% 7.3f[ms]", double(profTriangulate)*toMs);
|
|
ImGui::Text("Frame:"); ImGui::SameLine(100); ImGui::Text("% 7.3f[ms]", double(frameTime)*toMs);
|
|
|
|
ImGui::End();
|
|
|
|
imguiEndFrame();
|
|
|
|
// Advance to next frame. Rendering thread will be kicked to
|
|
// process submitted rendering primitives.
|
|
bgfx::frame();
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
entry::MouseState m_mouseState;
|
|
|
|
uint32_t m_width;
|
|
uint32_t m_height;
|
|
uint32_t m_debug;
|
|
uint32_t m_reset;
|
|
bgfx::ProgramHandle m_program;
|
|
|
|
Grid* m_grid;
|
|
int64_t m_timeOffset;
|
|
};
|
|
|
|
} // namespace
|
|
|
|
ENTRY_IMPLEMENT_MAIN(
|
|
ExampleMetaballs
|
|
, "02-metaball"
|
|
, "Rendering with transient buffers and embedding shaders."
|
|
, "https://bkaradzic.github.io/bgfx/examples.html#metaballs"
|
|
);
|