mirror of
https://github.com/scratchfoundation/bgfx.git
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285 lines
6.8 KiB
C++
285 lines
6.8 KiB
C++
/*
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* Copyright 2011-2016 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 "camera.h"
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#define CUBES_DIM 10
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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_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 PosColorVertex::ms_decl;
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static PosColorVertex s_cubeVertices[8] =
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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_cubeIndices[36] =
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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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class Occlusion : public entry::AppI
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{
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void init(int _argc, char** _argv) BX_OVERRIDE
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{
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Args args(_argc, _argv);
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uint32_t width = 1280;
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uint32_t height = 720;
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m_debug = BGFX_DEBUG_TEXT;
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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(width, height, m_reset);
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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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bgfx::setViewClear(2
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, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
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, 0x202020ff
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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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m_vbh = bgfx::createVertexBuffer(
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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_decl
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);
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// Create static index buffer.
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m_ibh = bgfx::createIndexBuffer(
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// Static data can be passed with bgfx::makeRef
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bgfx::makeRef(s_cubeIndices, sizeof(s_cubeIndices) )
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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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for (uint32_t ii = 0; ii < BX_COUNTOF(m_occlusionQueries); ++ii)
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{
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m_occlusionQueries[ii] = bgfx::createOcclusionQuery();
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}
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cameraCreate();
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const float initialPos[3] = { 15.5f, 0.0f, -15.5f };
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cameraSetPosition(initialPos);
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cameraSetHorizontalAngle(bx::toRad(-45.0f) );
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m_timeOffset = bx::getHPCounter();
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}
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virtual int shutdown() BX_OVERRIDE
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{
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// Cleanup.
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cameraDestroy();
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for (uint32_t ii = 0; ii < BX_COUNTOF(m_occlusionQueries); ++ii)
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{
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bgfx::destroyOcclusionQuery(m_occlusionQueries[ii]);
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}
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bgfx::destroyIndexBuffer(m_ibh);
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bgfx::destroyVertexBuffer(m_vbh);
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bgfx::destroyProgram(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() BX_OVERRIDE
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{
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if (!entry::processWindowEvents(m_state, m_debug, m_reset) )
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{
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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 double toMs = 1000.0/freq;
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const float time = (float)( (now-m_timeOffset)/double(bx::getHPFrequency() ) );
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const float deltaTime = float(frameTime/freq);
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// Use debug font to print information about this example.
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bgfx::dbgTextClear();
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bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/26-occlusion");
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bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Using occlusion query for conditional rendering.");
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bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
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uint32_t width = m_state.m_width;
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uint32_t height = m_state.m_height;
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// Update camera.
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float view[16];
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cameraUpdate(deltaTime, m_state.m_mouse);
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cameraGetViewMtx(view);
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// Set view and projection matrix for view 0.
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const bgfx::HMD* hmd = bgfx::getHMD();
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if (NULL != hmd && 0 != (hmd->flags & BGFX_HMD_RENDERING) )
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{
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float viewHead[16];
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float eye[3] = {};
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bx::mtxQuatTranslationHMD(viewHead, hmd->eye[0].rotation, eye);
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float tmp[16];
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bx::mtxMul(tmp, view, viewHead);
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float proj[16];
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bx::mtxProj(proj, hmd->eye[0].fov, 0.1f, 10000.0f);
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bgfx::setViewTransform(0, tmp, proj);
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bgfx::setViewRect(0, 0, 0, hmd->width, hmd->height);
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bgfx::setViewTransform(1, tmp, proj);
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bgfx::setViewRect(1, 0, 0, hmd->width, hmd->height);
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}
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else
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{
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float proj[16];
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bx::mtxProj(proj, 90.0f, float(width)/float(height), 0.1f, 10000.0f);
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bgfx::setViewTransform(0, view, proj);
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bgfx::setViewRect(0, 0, 0, width, height);
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bgfx::setViewTransform(1, view, proj);
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bgfx::setViewRect(1, 0, 0, width, height);
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float at[3] = { 0.0f, 0.0f, 0.0f };
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float eye[3] = { 17.5f, 10.0f, -17.5f };
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bx::mtxLookAt(view, eye, at);
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bgfx::setViewTransform(2, view, proj);
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bgfx::setViewRect(2, 10, height - height/4 - 10, width/4, height/4);
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}
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bgfx::touch(0);
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bgfx::touch(2);
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uint8_t img[CUBES_DIM*CUBES_DIM*2];
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for (uint32_t yy = 0; yy < CUBES_DIM; ++yy)
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{
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for (uint32_t xx = 0; xx < CUBES_DIM; ++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] = -(CUBES_DIM-1) * 3.0f / 2.0f + float(xx)*3.0f;
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mtx[13] = 0.0f;
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mtx[14] = -(CUBES_DIM-1) * 3.0f / 2.0f + float(yy)*3.0f;
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bgfx::OcclusionQueryHandle occlusionQuery = m_occlusionQueries[yy*CUBES_DIM+xx];
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bgfx::setTransform(mtx);
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bgfx::setVertexBuffer(m_vbh);
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bgfx::setIndexBuffer(m_ibh);
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bgfx::setCondition(occlusionQuery, true);
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bgfx::setState(BGFX_STATE_DEFAULT);
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bgfx::submit(0, m_program);
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bgfx::setTransform(mtx);
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bgfx::setVertexBuffer(m_vbh);
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bgfx::setIndexBuffer(m_ibh);
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bgfx::setState(0
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| BGFX_STATE_DEPTH_TEST_LEQUAL
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| BGFX_STATE_CULL_CW
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);
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bgfx::submit(1, m_program, occlusionQuery);
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bgfx::setTransform(mtx);
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bgfx::setVertexBuffer(m_vbh);
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bgfx::setIndexBuffer(m_ibh);
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bgfx::setCondition(occlusionQuery, true);
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bgfx::setState(BGFX_STATE_DEFAULT);
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bgfx::submit(2, m_program);
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img[(yy*CUBES_DIM+xx)*2+0] = " \xfex"[bgfx::getResult(occlusionQuery)];
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img[(yy*CUBES_DIM+xx)*2+1] = 0xf;
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}
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}
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for (uint32_t xx = 0; xx < CUBES_DIM; ++xx)
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{
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bgfx::dbgTextImage(5 + xx*2, 5, 1, CUBES_DIM, img + xx*2, CUBES_DIM*2);
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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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uint32_t m_reset;
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uint32_t m_debug;
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bgfx::VertexBufferHandle m_vbh;
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bgfx::IndexBufferHandle m_ibh;
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bgfx::ProgramHandle m_program;
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int64_t m_timeOffset;
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bgfx::OcclusionQueryHandle m_occlusionQueries[CUBES_DIM*CUBES_DIM];
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entry::WindowState m_state;
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};
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ENTRY_IMPLEMENT_MAIN(Occlusion);
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