291 lines
6.3 KiB
C++
291 lines
6.3 KiB
C++
/*
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* Copyright 2011-2019 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 <bx/rng.h>
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namespace
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{
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const uint32_t kDimWidth = 11;
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const uint32_t kDimHeight = 11;
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struct PosColorVertex
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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_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::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 PosColorVertex::ms_layout;
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static PosColorVertex s_cubeVertices[] =
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{
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{-1.0f, 1.0f, 1.0f, 0xff000000 },
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{ 1.0f, 1.0f, 1.0f, 0xff0000ff },
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{-1.0f, -1.0f, 1.0f, 0xff00ff00 },
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{ 1.0f, -1.0f, 1.0f, 0xff00ffff },
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{-1.0f, 1.0f, -1.0f, 0xffff0000 },
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{ 1.0f, 1.0f, -1.0f, 0xffff00ff },
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{-1.0f, -1.0f, -1.0f, 0xffffff00 },
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{ 1.0f, -1.0f, -1.0f, 0xffffffff },
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};
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static const uint16_t s_cubeTriList[] =
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{
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0, 1, 2, // 0
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1, 3, 2,
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4, 6, 5, // 2
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5, 6, 7,
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0, 2, 4, // 4
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4, 2, 6,
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1, 5, 3, // 6
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5, 7, 3,
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0, 4, 1, // 8
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4, 5, 1,
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2, 3, 6, // 10
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6, 3, 7,
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};
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static const uint16_t s_cubeTriStrip[] =
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{
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0, 1, 2,
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3,
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7,
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1,
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5,
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0,
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4,
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2,
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6,
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7,
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4,
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5,
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};
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class ExampleDynamic : public entry::AppI
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{
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public:
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ExampleDynamic(const char* _name, const char* _description, const char* _url)
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: entry::AppI(_name, _description, _url)
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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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BX_UNUSED(s_cubeTriList, s_cubeTriStrip);
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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 init;
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init.type = args.m_type;
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init.vendorId = args.m_pciId;
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init.resolution.width = m_width;
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init.resolution.height = m_height;
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init.resolution.reset = m_reset;
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bgfx::init(init);
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// Enable debug text.
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bgfx::setDebug(m_debug);
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// Set view 0 clear state.
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bgfx::setViewClear(0
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, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
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, 0x303030ff
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, 1.0f
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, 0
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);
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// Create vertex stream declaration.
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PosColorVertex::init();
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// Create static vertex buffer.
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for (uint32_t yy = 0; yy < kDimHeight; ++yy)
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{
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for (uint32_t xx = 0; xx < kDimWidth; ++xx)
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{
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m_vbh[yy*kDimWidth+xx] = bgfx::createDynamicVertexBuffer(
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// Static data can be passed with bgfx::makeRef
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bgfx::makeRef(s_cubeVertices, sizeof(s_cubeVertices) )
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, PosColorVertex::ms_layout
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);
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}
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}
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// Create static index buffer.
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m_ibh = bgfx::createDynamicIndexBuffer(
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// Static data can be passed with bgfx::makeRef
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bgfx::makeRef(s_cubeTriStrip, sizeof(s_cubeTriStrip) )
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);
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// Create program from shaders.
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m_program = loadProgram("vs_cubes", "fs_cubes");
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m_timeOffset = bx::getHPCounter();
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imguiCreate();
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}
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virtual int shutdown() override
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{
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imguiDestroy();
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// Cleanup.
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bgfx::destroy(m_ibh);
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for (uint32_t yy = 0; yy < kDimHeight; ++yy)
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{
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for (uint32_t xx = 0; xx < kDimWidth; ++xx)
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{
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bgfx::destroy(m_vbh[yy*kDimWidth+xx]);
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}
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}
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bgfx::destroy(m_program);
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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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imguiEndFrame();
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float time = (float)( (bx::getHPCounter()-m_timeOffset)/double(bx::getHPFrequency() ) );
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const bx::Vec3 at = { 0.0f, 0.0f, 0.0f };
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const bx::Vec3 eye = { 0.0f, 0.0f, -35.0f };
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// Set view and projection matrix for view 0.
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{
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float view[16];
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bx::mtxLookAt(view, eye, at);
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float proj[16];
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bx::mtxProj(proj, 60.0f, float(m_width)/float(m_height), 0.1f, 100.0f, bgfx::getCaps()->homogeneousDepth);
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bgfx::setViewTransform(0, view, proj);
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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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}
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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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float angle = bx::frnd(&m_mwc);
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float mtx[16];
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bx::mtxRotateZ(mtx, angle);
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const bgfx::Memory* mem = bgfx::copy(s_cubeVertices, sizeof(s_cubeVertices) );
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PosColorVertex* vertex = (PosColorVertex*)mem->data;
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const uint32_t abgr = m_mwc.gen();
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for (uint32_t ii = 0; ii < BX_COUNTOF(s_cubeVertices); ++ii)
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{
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bx::store(&vertex[ii].m_x, bx::mul(bx::load<bx::Vec3>(&s_cubeVertices[ii].m_x), mtx) );
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vertex[ii].m_abgr = abgr;
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}
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uint32_t idx = m_mwc.gen() % (kDimWidth*kDimHeight);
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bgfx::update(m_vbh[idx], 0, mem);
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}
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// Submit 11x11 cubes.
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for (uint32_t yy = 0; yy < kDimHeight; ++yy)
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{
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for (uint32_t xx = 0; xx < kDimWidth; ++xx)
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{
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float mtx[16];
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bx::mtxRotateXY(mtx, time + xx*0.21f, time + yy*0.37f);
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mtx[12] = -15.0f + float(xx)*3.0f;
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mtx[13] = -15.0f + float(yy)*3.0f;
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mtx[14] = 0.0f;
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// Set model matrix for rendering.
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bgfx::setTransform(mtx);
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// Set vertex and index buffer.
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bgfx::setVertexBuffer(0, m_vbh[yy*kDimWidth+xx]);
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bgfx::setIndexBuffer(m_ibh);
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// Set render states.
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bgfx::setState(0
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| BGFX_STATE_DEFAULT
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| BGFX_STATE_PT_TRISTRIP
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);
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// Submit primitive for rendering to view 0.
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bgfx::submit(0, m_program);
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}
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}
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// Advance to next frame. Rendering thread will be kicked to
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// process submitted rendering primitives.
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bgfx::frame();
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return true;
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}
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return false;
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}
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entry::MouseState m_mouseState;
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bx::RngMwc m_mwc;
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uint32_t m_width;
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uint32_t m_height;
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uint32_t m_debug;
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uint32_t m_reset;
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bgfx::DynamicVertexBufferHandle m_vbh[kDimWidth*kDimHeight];
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bgfx::DynamicIndexBufferHandle m_ibh;
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bgfx::ProgramHandle m_program;
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int64_t m_timeOffset;
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};
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} // namespace
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ENTRY_IMPLEMENT_MAIN(
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ExampleDynamic
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, "35-dynamic"
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, "Dynamic buffers update."
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, "https://bkaradzic.github.io/bgfx/examples.html#dynamic"
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);
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