bgfx/examples/26-occlusion/occlusion.cpp

287 lines
7.1 KiB
C++
Raw Normal View History

2015-11-02 04:28:23 +03:00
/*
2017-01-01 11:18:41 +03:00
* Copyright 2011-2017 Branimir Karadzic. All rights reserved.
2016-01-01 11:11:04 +03:00
* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
2015-11-02 04:28:23 +03:00
*/
#include "common.h"
#include "bgfx_utils.h"
#include "camera.h"
#define CUBES_DIM 10
struct PosColorVertex
{
float m_x;
float m_y;
float m_z;
uint32_t m_abgr;
static void init()
{
ms_decl
.begin()
.add(bgfx::Attrib::Position, 3, bgfx::AttribType::Float)
.add(bgfx::Attrib::Color0, 4, bgfx::AttribType::Uint8, true)
.end();
};
static bgfx::VertexDecl ms_decl;
};
bgfx::VertexDecl PosColorVertex::ms_decl;
static PosColorVertex s_cubeVertices[8] =
{
{-1.0f, 1.0f, 1.0f, 0xff000000 },
{ 1.0f, 1.0f, 1.0f, 0xff0000ff },
{-1.0f, -1.0f, 1.0f, 0xff00ff00 },
{ 1.0f, -1.0f, 1.0f, 0xff00ffff },
{-1.0f, 1.0f, -1.0f, 0xffff0000 },
{ 1.0f, 1.0f, -1.0f, 0xffff00ff },
{-1.0f, -1.0f, -1.0f, 0xffffff00 },
{ 1.0f, -1.0f, -1.0f, 0xffffffff },
};
static const uint16_t s_cubeIndices[36] =
{
0, 1, 2, // 0
1, 3, 2,
4, 6, 5, // 2
5, 6, 7,
0, 2, 4, // 4
4, 2, 6,
1, 5, 3, // 6
5, 7, 3,
0, 4, 1, // 8
4, 5, 1,
2, 3, 6, // 10
6, 3, 7,
};
2016-03-07 02:29:22 +03:00
class ExampleOcclusion : public entry::AppI
2015-11-02 04:28:23 +03:00
{
void init(int _argc, char** _argv) BX_OVERRIDE
{
Args args(_argc, _argv);
2015-11-02 07:11:31 +03:00
uint32_t width = 1280;
uint32_t height = 720;
2015-11-02 04:28:23 +03:00
m_debug = BGFX_DEBUG_TEXT;
m_reset = BGFX_RESET_VSYNC;
bgfx::init(args.m_type, args.m_pciId);
2015-11-02 07:11:31 +03:00
bgfx::reset(width, height, m_reset);
2015-11-02 04:28:23 +03:00
// 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
);
bgfx::setViewClear(2
, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
, 0x202020ff
, 1.0f
, 0
);
// Create vertex stream declaration.
PosColorVertex::init();
// Create static vertex buffer.
m_vbh = bgfx::createVertexBuffer(
// Static data can be passed with bgfx::makeRef
bgfx::makeRef(s_cubeVertices, sizeof(s_cubeVertices) )
, PosColorVertex::ms_decl
);
// Create static index buffer.
m_ibh = bgfx::createIndexBuffer(
// Static data can be passed with bgfx::makeRef
bgfx::makeRef(s_cubeIndices, sizeof(s_cubeIndices) )
);
// Create program from shaders.
m_program = loadProgram("vs_cubes", "fs_cubes");
for (uint32_t ii = 0; ii < BX_COUNTOF(m_occlusionQueries); ++ii)
{
m_occlusionQueries[ii] = bgfx::createOcclusionQuery();
}
cameraCreate();
const float initialPos[3] = { 15.5f, 0.0f, -15.5f };
cameraSetPosition(initialPos);
cameraSetHorizontalAngle(bx::toRad(-45.0f) );
m_timeOffset = bx::getHPCounter();
}
virtual int shutdown() BX_OVERRIDE
{
// Cleanup.
cameraDestroy();
for (uint32_t ii = 0; ii < BX_COUNTOF(m_occlusionQueries); ++ii)
{
bgfx::destroyOcclusionQuery(m_occlusionQueries[ii]);
}
bgfx::destroyIndexBuffer(m_ibh);
bgfx::destroyVertexBuffer(m_vbh);
bgfx::destroyProgram(m_program);
// Shutdown bgfx.
bgfx::shutdown();
return 0;
}
bool update() BX_OVERRIDE
{
if (!entry::processWindowEvents(m_state, m_debug, m_reset) )
{
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;
const float time = (float)( (now-m_timeOffset)/double(bx::getHPFrequency() ) );
const float deltaTime = float(frameTime/freq);
// Use debug font to print information about this example.
bgfx::dbgTextClear();
bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/26-occlusion");
2015-11-03 08:00:05 +03:00
bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Using occlusion query for conditional rendering.");
2015-11-02 04:28:23 +03:00
bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
uint32_t width = m_state.m_width;
uint32_t height = m_state.m_height;
// Update camera.
float view[16];
cameraUpdate(deltaTime, m_state.m_mouse);
cameraGetViewMtx(view);
// Set view and projection matrix for view 0.
const bgfx::HMD* hmd = bgfx::getHMD();
if (NULL != hmd && 0 != (hmd->flags & BGFX_HMD_RENDERING) )
{
float viewHead[16];
float eye[3] = {};
bx::mtxQuatTranslationHMD(viewHead, hmd->eye[0].rotation, eye);
float tmp[16];
bx::mtxMul(tmp, view, viewHead);
2016-04-02 12:41:40 +03:00
bgfx::setViewTransform(0, tmp, hmd->eye[0].projection);
2015-11-02 04:28:23 +03:00
bgfx::setViewRect(0, 0, 0, hmd->width, hmd->height);
2016-04-02 12:41:40 +03:00
bgfx::setViewTransform(1, tmp, hmd->eye[1].projection);
2015-11-02 04:28:23 +03:00
bgfx::setViewRect(1, 0, 0, hmd->width, hmd->height);
}
else
{
float proj[16];
2017-02-23 09:26:39 +03:00
bx::mtxProj(proj, 90.0f, float(width)/float(height), 0.1f, 10000.0f, bgfx::getCaps()->homogeneousDepth);
2015-11-02 04:28:23 +03:00
bgfx::setViewTransform(0, view, proj);
2017-03-13 04:25:23 +03:00
bgfx::setViewRect(0, 0, 0, uint16_t(width), uint16_t(height) );
2015-11-02 04:28:23 +03:00
bgfx::setViewTransform(1, view, proj);
2017-03-13 04:25:23 +03:00
bgfx::setViewRect(1, 0, 0, uint16_t(width), uint16_t(height) );
2015-11-02 04:28:23 +03:00
float at[3] = { 0.0f, 0.0f, 0.0f };
float eye[3] = { 17.5f, 10.0f, -17.5f };
bx::mtxLookAt(view, eye, at);
bgfx::setViewTransform(2, view, proj);
2017-03-13 04:25:23 +03:00
bgfx::setViewRect(2, 10, uint16_t(height - height/4 - 10), uint16_t(width/4), uint16_t(height/4) );
2015-11-02 04:28:23 +03:00
}
2015-11-02 06:12:42 +03:00
bgfx::touch(0);
bgfx::touch(2);
uint8_t img[CUBES_DIM*CUBES_DIM*2];
2015-11-02 04:28:23 +03:00
for (uint32_t yy = 0; yy < CUBES_DIM; ++yy)
{
for (uint32_t xx = 0; xx < CUBES_DIM; ++xx)
{
float mtx[16];
bx::mtxRotateXY(mtx, time + xx*0.21f, time + yy*0.37f);
mtx[12] = -(CUBES_DIM-1) * 3.0f / 2.0f + float(xx)*3.0f;
mtx[13] = 0.0f;
mtx[14] = -(CUBES_DIM-1) * 3.0f / 2.0f + float(yy)*3.0f;
bgfx::OcclusionQueryHandle occlusionQuery = m_occlusionQueries[yy*CUBES_DIM+xx];
bgfx::setTransform(mtx);
2017-05-14 21:48:59 +03:00
bgfx::setVertexBuffer(0, m_vbh);
2015-11-02 04:28:23 +03:00
bgfx::setIndexBuffer(m_ibh);
bgfx::setCondition(occlusionQuery, true);
bgfx::setState(BGFX_STATE_DEFAULT);
bgfx::submit(0, m_program);
bgfx::setTransform(mtx);
2017-05-14 21:48:59 +03:00
bgfx::setVertexBuffer(0, m_vbh);
2015-11-02 04:28:23 +03:00
bgfx::setIndexBuffer(m_ibh);
bgfx::setState(0
| BGFX_STATE_DEPTH_TEST_LEQUAL
| BGFX_STATE_CULL_CW
);
bgfx::submit(1, m_program, occlusionQuery);
bgfx::setTransform(mtx);
2017-05-14 21:48:59 +03:00
bgfx::setVertexBuffer(0, m_vbh);
2015-11-02 04:28:23 +03:00
bgfx::setIndexBuffer(m_ibh);
bgfx::setCondition(occlusionQuery, true);
bgfx::setState(BGFX_STATE_DEFAULT);
bgfx::submit(2, m_program);
img[(yy*CUBES_DIM+xx)*2+0] = " \xfex"[bgfx::getResult(occlusionQuery)];
img[(yy*CUBES_DIM+xx)*2+1] = 0xf;
2015-11-02 04:28:23 +03:00
}
}
2017-03-13 04:25:23 +03:00
for (uint16_t xx = 0; xx < CUBES_DIM; ++xx)
2015-11-04 04:20:20 +03:00
{
bgfx::dbgTextImage(5 + xx*2, 5, 1, CUBES_DIM, img + xx*2, CUBES_DIM*2);
}
2017-03-07 04:23:22 +03:00
int32_t numPixels = 0;
bgfx::getResult(m_occlusionQueries[0], &numPixels);
bgfx::dbgTextPrintf(5, 5 + CUBES_DIM + 1, 0xf, "%d", numPixels);
2015-11-02 04:28:23 +03:00
// Advance to next frame. Rendering thread will be kicked to
// process submitted rendering primitives.
bgfx::frame();
return true;
}
return false;
}
uint32_t m_reset;
uint32_t m_debug;
bgfx::VertexBufferHandle m_vbh;
bgfx::IndexBufferHandle m_ibh;
bgfx::ProgramHandle m_program;
int64_t m_timeOffset;
bgfx::OcclusionQueryHandle m_occlusionQueries[CUBES_DIM*CUBES_DIM];
entry::WindowState m_state;
};
2016-03-07 02:29:22 +03:00
ENTRY_IMPLEMENT_MAIN(ExampleOcclusion);