bgfx/examples/01-cubes/cubes.cpp

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/*
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* Copyright 2011-2015 Branimir Karadzic. All rights reserved.
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* License: http://www.opensource.org/licenses/BSD-2-Clause
*/
#include "common.h"
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#include "bgfx_utils.h"
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struct PosColorVertex
{
float m_x;
float m_y;
float m_z;
uint32_t m_abgr;
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static void init()
{
ms_decl
.begin()
.add(bgfx::Attrib::Position, 3, bgfx::AttribType::Float)
.add(bgfx::Attrib::Color0, 4, bgfx::AttribType::Uint8, true)
.end();
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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] =
{
{-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] =
{
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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,
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};
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int _main_(int /*_argc*/, char** /*_argv*/)
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{
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uint32_t width = 1280;
uint32_t height = 720;
uint32_t debug = BGFX_DEBUG_TEXT;
uint32_t reset = BGFX_RESET_VSYNC;
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bgfx::init();
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bgfx::reset(width, height, reset);
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// Enable debug text.
bgfx::setDebug(debug);
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// Set view 0 clear state.
bgfx::setViewClear(0
, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
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, 0x303030ff
, 1.0f
, 0
);
// Create vertex stream declaration.
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PosColorVertex::init();
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// Create static vertex buffer.
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bgfx::VertexBufferHandle vbh = bgfx::createVertexBuffer(
// Static data can be passed with bgfx::makeRef
bgfx::makeRef(s_cubeVertices, sizeof(s_cubeVertices) )
, PosColorVertex::ms_decl
);
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// Create static index buffer.
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bgfx::IndexBufferHandle ibh = bgfx::createIndexBuffer(
// Static data can be passed with bgfx::makeRef
bgfx::makeRef(s_cubeIndices, sizeof(s_cubeIndices) )
);
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// Create program from shaders.
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bgfx::ProgramHandle program = loadProgram("vs_cubes", "fs_cubes");
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int64_t timeOffset = bx::getHPCounter();
while (!entry::processEvents(width, height, debug, reset) )
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{
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-timeOffset)/double(bx::getHPFrequency() ) );
// Use debug font to print information about this example.
bgfx::dbgTextClear();
bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/01-cube");
bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Rendering simple static mesh.");
bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
float at[3] = { 0.0f, 0.0f, 0.0f };
float eye[3] = { 0.0f, 0.0f, -35.0f };
// Set view and projection matrix for view 0.
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const bgfx::HMD* hmd = bgfx::getHMD();
if (NULL != hmd && 0 != (hmd->flags & BGFX_HMD_RENDERING))
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{
float view[16];
bx::mtxQuatTranslationHMD(view, hmd->eye[0].rotation, eye);
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float proj[16];
bx::mtxProj(proj, hmd->eye[0].fov, 0.1f, 100.0f);
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bgfx::setViewTransform(0, view, proj);
// Set view 0 default viewport.
//
// Use HMD's width/height since HMD's internal frame buffer size
// might be much larger than window size.
bgfx::setViewRect(0, 0, 0, hmd->width, hmd->height);
}
else
{
float view[16];
bx::mtxLookAt(view, eye, at);
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float proj[16];
bx::mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
bgfx::setViewTransform(0, view, proj);
// Set view 0 default viewport.
bgfx::setViewRect(0, 0, 0, width, 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::submit(0);
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// Submit 11x11 cubes.
for (uint32_t yy = 0; yy < 11; ++yy)
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{
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for (uint32_t xx = 0; xx < 11; ++xx)
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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;
mtx[13] = -15.0f + float(yy)*3.0f;
mtx[14] = 0.0f;
// Set model matrix for rendering.
bgfx::setTransform(mtx);
// Set vertex and fragment shaders.
bgfx::setProgram(program);
// Set vertex and index buffer.
bgfx::setVertexBuffer(vbh);
bgfx::setIndexBuffer(ibh);
// Set render states.
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bgfx::setState(BGFX_STATE_DEFAULT);
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// Submit primitive for rendering to view 0.
bgfx::submit(0);
}
}
// Advance to next frame. Rendering thread will be kicked to
// process submitted rendering primitives.
bgfx::frame();
}
// Cleanup.
bgfx::destroyIndexBuffer(ibh);
bgfx::destroyVertexBuffer(vbh);
bgfx::destroyProgram(program);
// Shutdown bgfx.
bgfx::shutdown();
return 0;
}