772 lines
23 KiB
C++
772 lines
23 KiB
C++
/*
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* Copyright 2011-2017 Branimir Karadzic. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
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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 "camera.h"
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#include "bounds.h"
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namespace
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{
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#define RENDER_PASS_GEOMETRY_ID 0
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#define RENDER_PASS_LIGHT_ID 1
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#define RENDER_PASS_COMBINE_ID 2
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#define RENDER_PASS_DEBUG_LIGHTS_ID 3
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#define RENDER_PASS_DEBUG_GBUFFER_ID 4
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static float s_texelHalf = 0.0f;
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struct PosNormalTangentTexcoordVertex
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{
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float m_x;
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float m_y;
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float m_z;
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uint32_t m_normal;
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uint32_t m_tangent;
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int16_t m_u;
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int16_t m_v;
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static void init()
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{
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ms_decl
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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, 4, bgfx::AttribType::Uint8, true, true)
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.add(bgfx::Attrib::Tangent, 4, bgfx::AttribType::Uint8, true, true)
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.add(bgfx::Attrib::TexCoord0, 2, bgfx::AttribType::Int16, true, true)
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.end();
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}
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static bgfx::VertexDecl ms_decl;
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};
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bgfx::VertexDecl PosNormalTangentTexcoordVertex::ms_decl;
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struct PosTexCoord0Vertex
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{
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float m_x;
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float m_y;
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float m_z;
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float m_u;
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float m_v;
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static void init()
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{
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ms_decl
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.begin()
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.add(bgfx::Attrib::Position, 3, bgfx::AttribType::Float)
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.add(bgfx::Attrib::TexCoord0, 2, bgfx::AttribType::Float)
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.end();
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}
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static bgfx::VertexDecl ms_decl;
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};
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bgfx::VertexDecl PosTexCoord0Vertex::ms_decl;
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struct DebugVertex
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{
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float m_x;
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float m_y;
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float m_z;
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uint32_t m_abgr;
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static void init()
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{
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ms_decl
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.begin()
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.add(bgfx::Attrib::Position, 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::VertexDecl ms_decl;
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};
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bgfx::VertexDecl DebugVertex::ms_decl;
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static PosNormalTangentTexcoordVertex s_cubeVertices[24] =
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{
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{-1.0f, 1.0f, 1.0f, encodeNormalRgba8( 0.0f, 0.0f, 1.0f), 0, 0, 0 },
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{ 1.0f, 1.0f, 1.0f, encodeNormalRgba8( 0.0f, 0.0f, 1.0f), 0, 0x7fff, 0 },
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{-1.0f, -1.0f, 1.0f, encodeNormalRgba8( 0.0f, 0.0f, 1.0f), 0, 0, 0x7fff },
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{ 1.0f, -1.0f, 1.0f, encodeNormalRgba8( 0.0f, 0.0f, 1.0f), 0, 0x7fff, 0x7fff },
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{-1.0f, 1.0f, -1.0f, encodeNormalRgba8( 0.0f, 0.0f, -1.0f), 0, 0, 0 },
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{ 1.0f, 1.0f, -1.0f, encodeNormalRgba8( 0.0f, 0.0f, -1.0f), 0, 0x7fff, 0 },
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{-1.0f, -1.0f, -1.0f, encodeNormalRgba8( 0.0f, 0.0f, -1.0f), 0, 0, 0x7fff },
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{ 1.0f, -1.0f, -1.0f, encodeNormalRgba8( 0.0f, 0.0f, -1.0f), 0, 0x7fff, 0x7fff },
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{-1.0f, 1.0f, 1.0f, encodeNormalRgba8( 0.0f, 1.0f, 0.0f), 0, 0, 0 },
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{ 1.0f, 1.0f, 1.0f, encodeNormalRgba8( 0.0f, 1.0f, 0.0f), 0, 0x7fff, 0 },
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{-1.0f, 1.0f, -1.0f, encodeNormalRgba8( 0.0f, 1.0f, 0.0f), 0, 0, 0x7fff },
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{ 1.0f, 1.0f, -1.0f, encodeNormalRgba8( 0.0f, 1.0f, 0.0f), 0, 0x7fff, 0x7fff },
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{-1.0f, -1.0f, 1.0f, encodeNormalRgba8( 0.0f, -1.0f, 0.0f), 0, 0, 0 },
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{ 1.0f, -1.0f, 1.0f, encodeNormalRgba8( 0.0f, -1.0f, 0.0f), 0, 0x7fff, 0 },
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{-1.0f, -1.0f, -1.0f, encodeNormalRgba8( 0.0f, -1.0f, 0.0f), 0, 0, 0x7fff },
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{ 1.0f, -1.0f, -1.0f, encodeNormalRgba8( 0.0f, -1.0f, 0.0f), 0, 0x7fff, 0x7fff },
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{ 1.0f, -1.0f, 1.0f, encodeNormalRgba8( 1.0f, 0.0f, 0.0f), 0, 0, 0 },
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{ 1.0f, 1.0f, 1.0f, encodeNormalRgba8( 1.0f, 0.0f, 0.0f), 0, 0x7fff, 0 },
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{ 1.0f, -1.0f, -1.0f, encodeNormalRgba8( 1.0f, 0.0f, 0.0f), 0, 0, 0x7fff },
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{ 1.0f, 1.0f, -1.0f, encodeNormalRgba8( 1.0f, 0.0f, 0.0f), 0, 0x7fff, 0x7fff },
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{-1.0f, -1.0f, 1.0f, encodeNormalRgba8(-1.0f, 0.0f, 0.0f), 0, 0, 0 },
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{-1.0f, 1.0f, 1.0f, encodeNormalRgba8(-1.0f, 0.0f, 0.0f), 0, 0x7fff, 0 },
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{-1.0f, -1.0f, -1.0f, encodeNormalRgba8(-1.0f, 0.0f, 0.0f), 0, 0, 0x7fff },
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{-1.0f, 1.0f, -1.0f, encodeNormalRgba8(-1.0f, 0.0f, 0.0f), 0, 0x7fff, 0x7fff },
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};
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static const uint16_t s_cubeIndices[36] =
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{
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0, 2, 1,
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1, 2, 3,
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4, 5, 6,
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5, 7, 6,
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8, 10, 9,
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9, 10, 11,
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12, 13, 14,
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13, 15, 14,
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16, 18, 17,
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17, 18, 19,
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20, 21, 22,
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21, 23, 22,
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};
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void screenSpaceQuad(float _textureWidth, float _textureHeight, float _texelHalf, bool _originBottomLeft, float _width = 1.0f, float _height = 1.0f)
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{
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if (3 == bgfx::getAvailTransientVertexBuffer(3, PosTexCoord0Vertex::ms_decl) )
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{
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bgfx::TransientVertexBuffer vb;
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bgfx::allocTransientVertexBuffer(&vb, 3, PosTexCoord0Vertex::ms_decl);
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PosTexCoord0Vertex* vertex = (PosTexCoord0Vertex*)vb.data;
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const float minx = -_width;
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const float maxx = _width;
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const float miny = 0.0f;
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const float maxy = _height*2.0f;
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const float texelHalfW = _texelHalf/_textureWidth;
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const float texelHalfH = _texelHalf/_textureHeight;
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const float minu = -1.0f + texelHalfW;
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const float maxu = 1.0f + texelHalfH;
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const float zz = 0.0f;
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float minv = texelHalfH;
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float maxv = 2.0f + texelHalfH;
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if (_originBottomLeft)
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{
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float temp = minv;
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minv = maxv;
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maxv = temp;
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minv -= 1.0f;
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maxv -= 1.0f;
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}
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vertex[0].m_x = minx;
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vertex[0].m_y = miny;
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vertex[0].m_z = zz;
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vertex[0].m_u = minu;
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vertex[0].m_v = minv;
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vertex[1].m_x = maxx;
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vertex[1].m_y = miny;
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vertex[1].m_z = zz;
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vertex[1].m_u = maxu;
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vertex[1].m_v = minv;
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vertex[2].m_x = maxx;
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vertex[2].m_y = maxy;
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vertex[2].m_z = zz;
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vertex[2].m_u = maxu;
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vertex[2].m_v = maxv;
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bgfx::setVertexBuffer(0, &vb);
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}
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}
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class ExampleDeferred : public entry::AppI
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{
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public:
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ExampleDeferred(const char* _name, const char* _description)
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: entry::AppI(_name, _description)
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{
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}
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void init(int32_t _argc, const char* const* _argv, uint32_t _width, uint32_t _height) override
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{
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Args args(_argc, _argv);
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m_width = _width;
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m_height = _height;
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m_debug = BGFX_DEBUG_NONE;
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m_reset = BGFX_RESET_VSYNC;
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bgfx::init(args.m_type, args.m_pciId);
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bgfx::reset(m_width, m_height, m_reset);
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// Enable m_debug text.
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bgfx::setDebug(m_debug);
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// Set palette color for index 0
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bgfx::setPaletteColor(0, UINT32_C(0x00000000) );
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// Set palette color for index 1
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bgfx::setPaletteColor(1, UINT32_C(0x303030ff) );
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// Set geometry pass view clear state.
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bgfx::setViewClear(RENDER_PASS_GEOMETRY_ID
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, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
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, 1.0f
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, 0
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, 1
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);
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// Set light pass view clear state.
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bgfx::setViewClear(RENDER_PASS_LIGHT_ID
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, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
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, 1.0f
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, 0
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, 0
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);
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// Create vertex stream declaration.
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PosNormalTangentTexcoordVertex::init();
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PosTexCoord0Vertex::init();
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DebugVertex::init();
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calcTangents(s_cubeVertices
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, BX_COUNTOF(s_cubeVertices)
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, PosNormalTangentTexcoordVertex::ms_decl
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, s_cubeIndices
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, BX_COUNTOF(s_cubeIndices)
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);
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// Create static vertex buffer.
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m_vbh = bgfx::createVertexBuffer(
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bgfx::makeRef(s_cubeVertices, sizeof(s_cubeVertices) )
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, PosNormalTangentTexcoordVertex::ms_decl
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);
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// Create static index buffer.
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m_ibh = bgfx::createIndexBuffer(bgfx::makeRef(s_cubeIndices, sizeof(s_cubeIndices) ) );
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// Create texture sampler uniforms.
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s_texColor = bgfx::createUniform("s_texColor", bgfx::UniformType::Int1);
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s_texNormal = bgfx::createUniform("s_texNormal", bgfx::UniformType::Int1);
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s_albedo = bgfx::createUniform("s_albedo", bgfx::UniformType::Int1);
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s_normal = bgfx::createUniform("s_normal", bgfx::UniformType::Int1);
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s_depth = bgfx::createUniform("s_depth", bgfx::UniformType::Int1);
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s_light = bgfx::createUniform("s_light", bgfx::UniformType::Int1);
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u_mtx = bgfx::createUniform("u_mtx", bgfx::UniformType::Mat4);
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u_lightPosRadius = bgfx::createUniform("u_lightPosRadius", bgfx::UniformType::Vec4);
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u_lightRgbInnerR = bgfx::createUniform("u_lightRgbInnerR", bgfx::UniformType::Vec4);
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// Create program from shaders.
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m_geomProgram = loadProgram("vs_deferred_geom", "fs_deferred_geom");
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m_lightProgram = loadProgram("vs_deferred_light", "fs_deferred_light");
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m_combineProgram = loadProgram("vs_deferred_combine", "fs_deferred_combine");
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m_debugProgram = loadProgram("vs_deferred_debug", "fs_deferred_debug");
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m_lineProgram = loadProgram("vs_deferred_debug_line", "fs_deferred_debug_line");
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// Load diffuse texture.
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m_textureColor = loadTexture("textures/fieldstone-rgba.dds");
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// Load normal texture.
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m_textureNormal = loadTexture("textures/fieldstone-n.dds");
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m_gbufferTex[0].idx = bgfx::kInvalidHandle;
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m_gbufferTex[1].idx = bgfx::kInvalidHandle;
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m_gbufferTex[2].idx = bgfx::kInvalidHandle;
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m_gbuffer.idx = bgfx::kInvalidHandle;
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m_lightBuffer.idx = bgfx::kInvalidHandle;
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// Imgui.
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imguiCreate();
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m_timeOffset = bx::getHPCounter();
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const bgfx::RendererType::Enum renderer = bgfx::getRendererType();
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s_texelHalf = bgfx::RendererType::Direct3D9 == renderer ? 0.5f : 0.0f;
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// Get renderer capabilities info.
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m_caps = bgfx::getCaps();
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m_oldWidth = 0;
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m_oldHeight = 0;
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m_oldReset = m_reset;
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m_scrollArea = 0;
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m_numLights = 512;
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m_lightAnimationSpeed = 0.3f;
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m_animateMesh = true;
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m_showScissorRects = false;
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m_showGBuffer = true;
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cameraCreate();
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const float initialPos[3] = { 0.0f, 0.0f, -15.0f };
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cameraSetPosition(initialPos);
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cameraSetVerticalAngle(0.0f);
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}
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virtual int shutdown() override
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{
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// Cleanup.
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cameraDestroy();
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imguiDestroy();
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if (bgfx::isValid(m_gbuffer) )
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{
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bgfx::destroy(m_gbuffer);
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bgfx::destroy(m_lightBuffer);
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}
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bgfx::destroy(m_ibh);
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bgfx::destroy(m_vbh);
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bgfx::destroy(m_geomProgram);
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bgfx::destroy(m_lightProgram);
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bgfx::destroy(m_combineProgram);
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bgfx::destroy(m_debugProgram);
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bgfx::destroy(m_lineProgram);
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bgfx::destroy(m_textureColor);
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bgfx::destroy(m_textureNormal);
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bgfx::destroy(s_texColor);
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bgfx::destroy(s_texNormal);
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bgfx::destroy(s_albedo);
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bgfx::destroy(s_normal);
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bgfx::destroy(s_depth);
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bgfx::destroy(s_light);
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bgfx::destroy(u_lightPosRadius);
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bgfx::destroy(u_lightRgbInnerR);
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bgfx::destroy(u_mtx);
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// Shutdown bgfx.
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bgfx::shutdown();
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return 0;
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}
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bool update() override
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{
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if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
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{
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imguiBeginFrame(m_mouseState.m_mx
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, m_mouseState.m_my
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, (m_mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
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| (m_mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
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| (m_mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
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, m_mouseState.m_mz
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, uint16_t(m_width)
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, uint16_t(m_height)
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);
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showExampleDialog(this);
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int64_t now = bx::getHPCounter();
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static int64_t last = now;
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const int64_t frameTime = now - last;
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last = now;
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const double freq = double(bx::getHPFrequency() );
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const float deltaTime = float(frameTime/freq);
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float time = (float)( (now-m_timeOffset)/freq);
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if (2 > m_caps->limits.maxFBAttachments)
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{
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// When multiple render targets (MRT) is not supported by GPU,
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// implement alternative code path that doesn't use MRT.
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bool blink = uint32_t(time*3.0f)&1;
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bgfx::dbgTextPrintf(0, 0, blink ? 0x1f : 0x01, " MRT not supported by GPU. ");
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// Set view 0 default viewport.
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bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) );
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// This dummy draw call is here to make sure that view 0 is cleared
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// if no other draw calls are submitted to view 0.
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bgfx::touch(0);
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}
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else
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{
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if (m_oldWidth != m_width
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|| m_oldHeight != m_height
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|| m_oldReset != m_reset
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|| !bgfx::isValid(m_gbuffer) )
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{
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// Recreate variable size render targets when resolution changes.
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m_oldWidth = m_width;
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m_oldHeight = m_height;
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m_oldReset = m_reset;
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if (bgfx::isValid(m_gbuffer) )
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{
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bgfx::destroy(m_gbuffer);
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}
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const uint32_t samplerFlags = 0
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| BGFX_TEXTURE_RT
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| BGFX_TEXTURE_MIN_POINT
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| BGFX_TEXTURE_MAG_POINT
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| BGFX_TEXTURE_MIP_POINT
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| BGFX_TEXTURE_U_CLAMP
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| BGFX_TEXTURE_V_CLAMP
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;
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m_gbufferTex[0] = bgfx::createTexture2D(uint16_t(m_width), uint16_t(m_height), false, 1, bgfx::TextureFormat::BGRA8, samplerFlags);
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m_gbufferTex[1] = bgfx::createTexture2D(uint16_t(m_width), uint16_t(m_height), false, 1, bgfx::TextureFormat::BGRA8, samplerFlags);
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m_gbufferTex[2] = bgfx::createTexture2D(uint16_t(m_width), uint16_t(m_height), false, 1, bgfx::TextureFormat::D24, samplerFlags);
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m_gbuffer = bgfx::createFrameBuffer(BX_COUNTOF(m_gbufferTex), m_gbufferTex, true);
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if (bgfx::isValid(m_lightBuffer) )
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{
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bgfx::destroy(m_lightBuffer);
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}
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m_lightBuffer = bgfx::createFrameBuffer(uint16_t(m_width), uint16_t(m_height), bgfx::TextureFormat::BGRA8, samplerFlags);
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}
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ImGui::SetNextWindowPos(
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ImVec2(m_width - m_width / 5.0f - 10.0f, 10.0f)
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, ImGuiSetCond_FirstUseEver
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);
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ImGui::Begin("Settings"
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, NULL
|
|
, ImVec2(m_width / 5.0f, m_height / 3.0f)
|
|
, ImGuiWindowFlags_AlwaysAutoResize
|
|
);
|
|
|
|
ImGui::SliderInt("Num lights", &m_numLights, 1, 2048);
|
|
ImGui::Checkbox("Show G-Buffer.", &m_showGBuffer);
|
|
ImGui::Checkbox("Show light scissor.", &m_showScissorRects);
|
|
ImGui::Checkbox("Animate mesh.", &m_animateMesh);
|
|
ImGui::SliderFloat("Anim.speed", &m_lightAnimationSpeed, 0.0f, 0.4f);
|
|
|
|
ImGui::End();
|
|
|
|
// Update camera.
|
|
cameraUpdate(deltaTime, m_mouseState);
|
|
|
|
float view[16];
|
|
cameraGetViewMtx(view);
|
|
|
|
// Setup views
|
|
float vp[16];
|
|
float invMvp[16];
|
|
{
|
|
bgfx::setViewRect(RENDER_PASS_GEOMETRY_ID, 0, 0, uint16_t(m_width), uint16_t(m_height) );
|
|
bgfx::setViewRect(RENDER_PASS_LIGHT_ID, 0, 0, uint16_t(m_width), uint16_t(m_height) );
|
|
bgfx::setViewRect(RENDER_PASS_COMBINE_ID, 0, 0, uint16_t(m_width), uint16_t(m_height) );
|
|
bgfx::setViewRect(RENDER_PASS_DEBUG_LIGHTS_ID, 0, 0, uint16_t(m_width), uint16_t(m_height) );
|
|
bgfx::setViewRect(RENDER_PASS_DEBUG_GBUFFER_ID, 0, 0, uint16_t(m_width), uint16_t(m_height) );
|
|
|
|
bgfx::setViewFrameBuffer(RENDER_PASS_LIGHT_ID, m_lightBuffer);
|
|
|
|
float proj[16];
|
|
bx::mtxProj(proj, 60.0f, float(m_width)/float(m_height), 0.1f, 100.0f, m_caps->homogeneousDepth);
|
|
|
|
bgfx::setViewFrameBuffer(RENDER_PASS_GEOMETRY_ID, m_gbuffer);
|
|
bgfx::setViewTransform(RENDER_PASS_GEOMETRY_ID, view, proj);
|
|
|
|
bx::mtxMul(vp, view, proj);
|
|
bx::mtxInverse(invMvp, vp);
|
|
|
|
const bgfx::Caps* caps = bgfx::getCaps();
|
|
|
|
bx::mtxOrtho(proj, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 100.0f, 0.0f, caps->homogeneousDepth);
|
|
bgfx::setViewTransform(RENDER_PASS_LIGHT_ID, NULL, proj);
|
|
bgfx::setViewTransform(RENDER_PASS_COMBINE_ID, NULL, proj);
|
|
|
|
const float aspectRatio = float(m_height)/float(m_width);
|
|
const float size = 10.0f;
|
|
bx::mtxOrtho(proj, -size, size, size*aspectRatio, -size*aspectRatio, 0.0f, 1000.0f, 0.0f, caps->homogeneousDepth);
|
|
bgfx::setViewTransform(RENDER_PASS_DEBUG_GBUFFER_ID, NULL, proj);
|
|
|
|
bx::mtxOrtho(proj, 0.0f, (float)m_width, 0.0f, (float)m_height, 0.0f, 1000.0f, 0.0f, caps->homogeneousDepth);
|
|
bgfx::setViewTransform(RENDER_PASS_DEBUG_LIGHTS_ID, NULL, proj);
|
|
}
|
|
|
|
const uint32_t dim = 11;
|
|
const float offset = (float(dim-1) * 3.0f) * 0.5f;
|
|
|
|
// Draw into geometry pass.
|
|
for (uint32_t yy = 0; yy < dim; ++yy)
|
|
{
|
|
for (uint32_t xx = 0; xx < dim; ++xx)
|
|
{
|
|
float mtx[16];
|
|
if (m_animateMesh)
|
|
{
|
|
bx::mtxRotateXY(mtx, time*1.023f + xx*0.21f, time*0.03f + yy*0.37f);
|
|
}
|
|
else
|
|
{
|
|
bx::mtxIdentity(mtx);
|
|
}
|
|
mtx[12] = -offset + float(xx)*3.0f;
|
|
mtx[13] = -offset + float(yy)*3.0f;
|
|
mtx[14] = 0.0f;
|
|
|
|
// Set transform for draw call.
|
|
bgfx::setTransform(mtx);
|
|
|
|
// Set vertex and index buffer.
|
|
bgfx::setVertexBuffer(0, m_vbh);
|
|
bgfx::setIndexBuffer(m_ibh);
|
|
|
|
// Bind textures.
|
|
bgfx::setTexture(0, s_texColor, m_textureColor);
|
|
bgfx::setTexture(1, s_texNormal, m_textureNormal);
|
|
|
|
// Set render states.
|
|
bgfx::setState(0
|
|
| BGFX_STATE_RGB_WRITE
|
|
| BGFX_STATE_ALPHA_WRITE
|
|
| BGFX_STATE_DEPTH_WRITE
|
|
| BGFX_STATE_DEPTH_TEST_LESS
|
|
| BGFX_STATE_MSAA
|
|
);
|
|
|
|
// Submit primitive for rendering to view 0.
|
|
bgfx::submit(RENDER_PASS_GEOMETRY_ID, m_geomProgram);
|
|
}
|
|
}
|
|
|
|
// Draw lights into light buffer.
|
|
for (int32_t light = 0; light < m_numLights; ++light)
|
|
{
|
|
Sphere lightPosRadius;
|
|
|
|
float lightTime = time * m_lightAnimationSpeed * (bx::fsin(light/float(m_numLights) * bx::kPiHalf ) * 0.5f + 0.5f);
|
|
lightPosRadius.m_center[0] = bx::fsin( ( (lightTime + light*0.47f) + bx::kPiHalf*1.37f ) )*offset;
|
|
lightPosRadius.m_center[1] = bx::fcos( ( (lightTime + light*0.69f) + bx::kPiHalf*1.49f ) )*offset;
|
|
lightPosRadius.m_center[2] = bx::fsin( ( (lightTime + light*0.37f) + bx::kPiHalf*1.57f ) )*2.0f;
|
|
lightPosRadius.m_radius = 2.0f;
|
|
|
|
Aabb aabb;
|
|
toAabb(aabb, lightPosRadius);
|
|
|
|
float box[8][3] =
|
|
{
|
|
{ aabb.m_min[0], aabb.m_min[1], aabb.m_min[2] },
|
|
{ aabb.m_min[0], aabb.m_min[1], aabb.m_max[2] },
|
|
{ aabb.m_min[0], aabb.m_max[1], aabb.m_min[2] },
|
|
{ aabb.m_min[0], aabb.m_max[1], aabb.m_max[2] },
|
|
{ aabb.m_max[0], aabb.m_min[1], aabb.m_min[2] },
|
|
{ aabb.m_max[0], aabb.m_min[1], aabb.m_max[2] },
|
|
{ aabb.m_max[0], aabb.m_max[1], aabb.m_min[2] },
|
|
{ aabb.m_max[0], aabb.m_max[1], aabb.m_max[2] },
|
|
};
|
|
|
|
float xyz[3];
|
|
bx::vec3MulMtxH(xyz, box[0], vp);
|
|
float minx = xyz[0];
|
|
float miny = xyz[1];
|
|
float maxx = xyz[0];
|
|
float maxy = xyz[1];
|
|
float maxz = xyz[2];
|
|
|
|
for (uint32_t ii = 1; ii < 8; ++ii)
|
|
{
|
|
bx::vec3MulMtxH(xyz, box[ii], vp);
|
|
minx = bx::fmin(minx, xyz[0]);
|
|
miny = bx::fmin(miny, xyz[1]);
|
|
maxx = bx::fmax(maxx, xyz[0]);
|
|
maxy = bx::fmax(maxy, xyz[1]);
|
|
maxz = bx::fmax(maxz, xyz[2]);
|
|
}
|
|
|
|
// Cull light if it's fully behind camera.
|
|
if (maxz >= 0.0f)
|
|
{
|
|
float x0 = bx::fclamp( (minx * 0.5f + 0.5f) * m_width, 0.0f, (float)m_width);
|
|
float y0 = bx::fclamp( (miny * 0.5f + 0.5f) * m_height, 0.0f, (float)m_height);
|
|
float x1 = bx::fclamp( (maxx * 0.5f + 0.5f) * m_width, 0.0f, (float)m_width);
|
|
float y1 = bx::fclamp( (maxy * 0.5f + 0.5f) * m_height, 0.0f, (float)m_height);
|
|
|
|
if (m_showScissorRects)
|
|
{
|
|
bgfx::TransientVertexBuffer tvb;
|
|
bgfx::TransientIndexBuffer tib;
|
|
if (bgfx::allocTransientBuffers(&tvb, DebugVertex::ms_decl, 4, &tib, 8) )
|
|
{
|
|
uint32_t abgr = 0x8000ff00;
|
|
|
|
DebugVertex* vertex = (DebugVertex*)tvb.data;
|
|
vertex->m_x = x0;
|
|
vertex->m_y = y0;
|
|
vertex->m_z = 0.0f;
|
|
vertex->m_abgr = abgr;
|
|
++vertex;
|
|
|
|
vertex->m_x = x1;
|
|
vertex->m_y = y0;
|
|
vertex->m_z = 0.0f;
|
|
vertex->m_abgr = abgr;
|
|
++vertex;
|
|
|
|
vertex->m_x = x1;
|
|
vertex->m_y = y1;
|
|
vertex->m_z = 0.0f;
|
|
vertex->m_abgr = abgr;
|
|
++vertex;
|
|
|
|
vertex->m_x = x0;
|
|
vertex->m_y = y1;
|
|
vertex->m_z = 0.0f;
|
|
vertex->m_abgr = abgr;
|
|
|
|
uint16_t* indices = (uint16_t*)tib.data;
|
|
*indices++ = 0;
|
|
*indices++ = 1;
|
|
*indices++ = 1;
|
|
*indices++ = 2;
|
|
*indices++ = 2;
|
|
*indices++ = 3;
|
|
*indices++ = 3;
|
|
*indices++ = 0;
|
|
|
|
bgfx::setVertexBuffer(0, &tvb);
|
|
bgfx::setIndexBuffer(&tib);
|
|
bgfx::setState(0
|
|
| BGFX_STATE_RGB_WRITE
|
|
| BGFX_STATE_PT_LINES
|
|
| BGFX_STATE_BLEND_ALPHA
|
|
);
|
|
bgfx::submit(RENDER_PASS_DEBUG_LIGHTS_ID, m_lineProgram);
|
|
}
|
|
}
|
|
|
|
uint8_t val = light&7;
|
|
float lightRgbInnerR[4] =
|
|
{
|
|
val & 0x1 ? 1.0f : 0.25f,
|
|
val & 0x2 ? 1.0f : 0.25f,
|
|
val & 0x4 ? 1.0f : 0.25f,
|
|
0.8f,
|
|
};
|
|
|
|
// Draw light.
|
|
bgfx::setUniform(u_lightPosRadius, &lightPosRadius);
|
|
bgfx::setUniform(u_lightRgbInnerR, lightRgbInnerR);
|
|
bgfx::setUniform(u_mtx, invMvp);
|
|
const uint16_t scissorHeight = uint16_t(y1-y0);
|
|
bgfx::setScissor(uint16_t(x0), uint16_t(m_height-scissorHeight-y0), uint16_t(x1-x0), uint16_t(scissorHeight) );
|
|
bgfx::setTexture(0, s_normal, bgfx::getTexture(m_gbuffer, 1) );
|
|
bgfx::setTexture(1, s_depth, bgfx::getTexture(m_gbuffer, 2) );
|
|
bgfx::setState(0
|
|
| BGFX_STATE_RGB_WRITE
|
|
| BGFX_STATE_ALPHA_WRITE
|
|
| BGFX_STATE_BLEND_ADD
|
|
);
|
|
screenSpaceQuad( (float)m_width, (float)m_height, s_texelHalf, m_caps->originBottomLeft);
|
|
bgfx::submit(RENDER_PASS_LIGHT_ID, m_lightProgram);
|
|
}
|
|
}
|
|
|
|
// Combine color and light buffers.
|
|
bgfx::setTexture(0, s_albedo, bgfx::getTexture(m_gbuffer, 0) );
|
|
bgfx::setTexture(1, s_light, bgfx::getTexture(m_lightBuffer, 0) );
|
|
bgfx::setState(0
|
|
| BGFX_STATE_RGB_WRITE
|
|
| BGFX_STATE_ALPHA_WRITE
|
|
);
|
|
screenSpaceQuad( (float)m_width, (float)m_height, s_texelHalf, m_caps->originBottomLeft);
|
|
bgfx::submit(RENDER_PASS_COMBINE_ID, m_combineProgram);
|
|
|
|
if (m_showGBuffer)
|
|
{
|
|
const float aspectRatio = float(m_width)/float(m_height);
|
|
|
|
// Draw m_debug m_gbuffer.
|
|
for (uint32_t ii = 0; ii < BX_COUNTOF(m_gbufferTex); ++ii)
|
|
{
|
|
float mtx[16];
|
|
bx::mtxSRT(mtx
|
|
, aspectRatio, 1.0f, 1.0f
|
|
, 0.0f, 0.0f, 0.0f
|
|
, -7.9f - BX_COUNTOF(m_gbufferTex)*0.1f*0.5f + ii*2.1f*aspectRatio, 4.0f, 0.0f
|
|
);
|
|
|
|
bgfx::setTransform(mtx);
|
|
bgfx::setVertexBuffer(0, m_vbh);
|
|
bgfx::setIndexBuffer(m_ibh, 0, 6);
|
|
bgfx::setTexture(0, s_texColor, m_gbufferTex[ii]);
|
|
bgfx::setState(BGFX_STATE_RGB_WRITE);
|
|
bgfx::submit(RENDER_PASS_DEBUG_GBUFFER_ID, m_debugProgram);
|
|
}
|
|
}
|
|
}
|
|
|
|
imguiEndFrame();
|
|
|
|
// Advance to next frame. Rendering thread will be kicked to
|
|
// process submitted rendering primitives.
|
|
bgfx::frame();
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bgfx::VertexBufferHandle m_vbh;
|
|
bgfx::IndexBufferHandle m_ibh;
|
|
bgfx::UniformHandle s_texColor;
|
|
bgfx::UniformHandle s_texNormal;
|
|
|
|
bgfx::UniformHandle s_albedo;
|
|
bgfx::UniformHandle s_normal;
|
|
bgfx::UniformHandle s_depth;
|
|
bgfx::UniformHandle s_light;
|
|
|
|
bgfx::UniformHandle u_mtx;
|
|
bgfx::UniformHandle u_lightPosRadius;
|
|
bgfx::UniformHandle u_lightRgbInnerR;
|
|
|
|
bgfx::ProgramHandle m_geomProgram;
|
|
bgfx::ProgramHandle m_lightProgram;
|
|
bgfx::ProgramHandle m_combineProgram;
|
|
bgfx::ProgramHandle m_debugProgram;
|
|
bgfx::ProgramHandle m_lineProgram;
|
|
bgfx::TextureHandle m_textureColor;
|
|
bgfx::TextureHandle m_textureNormal;
|
|
|
|
bgfx::TextureHandle m_gbufferTex[3];
|
|
bgfx::FrameBufferHandle m_gbuffer;
|
|
bgfx::FrameBufferHandle m_lightBuffer;
|
|
|
|
uint32_t m_width;
|
|
uint32_t m_height;
|
|
uint32_t m_debug;
|
|
uint32_t m_reset;
|
|
|
|
uint32_t m_oldWidth;
|
|
uint32_t m_oldHeight;
|
|
uint32_t m_oldReset;
|
|
|
|
int32_t m_scrollArea;
|
|
int32_t m_numLights;
|
|
float m_lightAnimationSpeed;
|
|
bool m_animateMesh;
|
|
bool m_showScissorRects;
|
|
bool m_showGBuffer;
|
|
|
|
entry::MouseState m_mouseState;
|
|
|
|
const bgfx::Caps* m_caps;
|
|
int64_t m_timeOffset;
|
|
};
|
|
|
|
} // namespace
|
|
|
|
ENTRY_IMPLEMENT_MAIN(ExampleDeferred, "21-deferred", "MRT rendering and deferred shading.");
|