int _main_(int /*_argc*/, char** /*_argv*/)
{
// Create vertex stream declaration.
PosColorVertex::init();
PosColorTexCoord0Vertex::init();
uint32_t width = 1280;
uint32_t height = 720;
uint32_t debug = BGFX_DEBUG_TEXT;
uint32_t reset = BGFX_RESET_VSYNC;
bgfx::init();
bgfx::reset(width, height, reset);
// Enable debug text.
bgfx::setDebug(debug);
// Get renderer capabilities info.
const bgfx::Caps* caps = bgfx::getCaps();
// Setup root path for binary shaders. Shader binaries are different
// for each renderer.
switch (caps->rendererType)
{
default:
break;
case bgfx::RendererType::OpenGL:
case bgfx::RendererType::OpenGLES:
s_flipV = true;
break;
}
// Imgui.
void* data = load("font/droidsans.ttf");
imguiCreate(data);
free(data);
const bgfx::Memory* mem;
// Create static vertex buffer.
mem = bgfx::makeRef(s_cubeVertices, sizeof(s_cubeVertices) );
bgfx::VertexBufferHandle vbh = bgfx::createVertexBuffer(mem, PosColorVertex::ms_decl);
// Create static index buffer.
mem = bgfx::makeRef(s_cubeIndices, sizeof(s_cubeIndices) );
bgfx::IndexBufferHandle ibh = bgfx::createIndexBuffer(mem);
// Create texture sampler uniforms.
bgfx::UniformHandle u_texColor0 = bgfx::createUniform("u_texColor0", bgfx::UniformType::Uniform1iv);
bgfx::UniformHandle u_texColor1 = bgfx::createUniform("u_texColor1", bgfx::UniformType::Uniform1iv);
bgfx::UniformHandle u_color = bgfx::createUniform("u_color", bgfx::UniformType::Uniform4fv);
bgfx::ProgramHandle blend = loadProgram("vs_oit", "fs_oit" );
bgfx::ProgramHandle wbSeparatePass = loadProgram("vs_oit", "fs_oit_wb_separate" );
bgfx::ProgramHandle wbSeparateBlit = loadProgram("vs_oit_blit", "fs_oit_wb_separate_blit" );
bgfx::ProgramHandle wbPass = loadProgram("vs_oit", "fs_oit_wb" );
bgfx::ProgramHandle wbBlit = loadProgram("vs_oit_blit", "fs_oit_wb_blit" );
bgfx::TextureHandle fbtextures[2] = { BGFX_INVALID_HANDLE, BGFX_INVALID_HANDLE };
bgfx::FrameBufferHandle fbh = BGFX_INVALID_HANDLE;
int64_t timeOffset = bx::getHPCounter();
uint32_t mode = 1;
int32_t scrollArea = 0;
bool frontToBack = true;
bool fadeInOut = false;
uint32_t oldWidth = 0;
uint32_t oldHeight = 0;
uint32_t oldReset = reset;
entry::MouseState mouseState;
while (!entry::processEvents(width, height, debug, reset, &mouseState) )
{
if (oldWidth != width
|| oldHeight != height
|| oldReset != reset
|| !bgfx::isValid(fbh) )
{
// Recreate variable size render targets when resolution changes.
oldWidth = width;
oldHeight = height;
oldReset = reset;
if (bgfx::isValid(fbh) )
{
bgfx::destroyFrameBuffer(fbh);
}
fbtextures[0] = bgfx::createTexture2D(width, height, 1, bgfx::TextureFormat::RGBA16F, BGFX_TEXTURE_RT);
fbtextures[1] = bgfx::createTexture2D(width, height, 1, bgfx::TextureFormat::R16F, BGFX_TEXTURE_RT);
fbh = bgfx::createFrameBuffer(BX_COUNTOF(fbtextures), fbtextures, true);
}
imguiBeginFrame(mouseState.m_mx
, mouseState.m_my
, (mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
| (mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
, 0
, width
, height
);
imguiBeginScrollArea("Settings", width - width / 4 - 10, 10, width / 4, height / 3, &scrollArea);
imguiSeparatorLine();
imguiLabel("Blend mode:");
mode = imguiChoose(mode
, "None"
, "Separate"
, "MRT Independent"
);
imguiSeparatorLine();
if (imguiCheck("Front to back", frontToBack) )
{
frontToBack ^= true;
}
if (imguiCheck("Fade in/out", fadeInOut) )
{
fadeInOut ^= true;
}
imguiEndScrollArea();
imguiEndFrame();
// Set view 0 default viewport.
bgfx::setViewRectMask(0x3, 0, 0, width, height);
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)/freq);
// Use debug font to print information about this example.
bgfx::dbgTextClear();
// Reference:
// Weighted, Blended Order-Independent Transparency
// http://jcgt.org/published/0002/02/09/
// http://casual-effects.blogspot.com/2014/03/weighted-blended-order-independent.html
bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/19-oit");
bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Weighted, Blended Order Independent Transparency.");
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, -7.0f };
float view[16];
float proj[16];
// Set view and projection matrix for view 0.
bx::mtxLookAt(view, eye, at);
bx::mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
bgfx::setViewTransform(0, view, proj);
bgfx::setViewClearMask(0x3
, BGFX_CLEAR_COLOR_BIT|BGFX_CLEAR_DEPTH_BIT
, 0x00000000
, 1.0f
, 0
);
bgfx::FrameBufferHandle invalid = BGFX_INVALID_HANDLE;
bgfx::setViewFrameBuffer(0, 0 == mode ? invalid : fbh);
// Set view and projection matrix for view 1.
bx::mtxIdentity(view);
bx::mtxOrtho(proj, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 100.0f);
bgfx::setViewTransform(1, view, proj);
for (uint32_t depth = 0; depth < 3; ++depth)
{
uint32_t zz = frontToBack ? 2-depth : depth;
for (uint32_t yy = 0; yy < 3; ++yy)
{
for (uint32_t xx = 0; xx < 3; ++xx)
{
float color[4] = { xx*1.0f/3.0f, zz*1.0f/3.0f, yy*1.0f/3.0f, 0.5f };
if (fadeInOut
&& zz == 1)
{
color[3] = sinf(time*3.0f)*0.49f+0.5f;
}
bgfx::setUniform(u_color, color);
BX_UNUSED(time);
float mtx[16];
bx::mtxRotateXY(mtx, time*0.023f + xx*0.21f, time*0.03f + yy*0.37f);
//mtxIdentity(mtx);
mtx[12] = -2.5f + float(xx)*2.5f;
mtx[13] = -2.5f + float(yy)*2.5f;
mtx[14] = -2.5f + float(zz)*2.5f; //0.0f; // sinf(time + ( (xx+1)*(yy+1)/9.0f)*float(M_PI) )*50.0f+50.0f; //90.0f - (xx+1)*(yy+1)*10.0f;
// Set transform for draw call.
bgfx::setTransform(mtx);
// Set vertex and index buffer.
bgfx::setVertexBuffer(vbh);
bgfx::setIndexBuffer(ibh);
const uint64_t state = 0
| BGFX_STATE_CULL_CW
| BGFX_STATE_RGB_WRITE
| BGFX_STATE_ALPHA_WRITE
| BGFX_STATE_DEPTH_TEST_LESS
| BGFX_STATE_MSAA
;
switch (mode)
{
case 0:
// Set vertex and fragment shaders.
bgfx::setProgram(blend);
// Set render states.
bgfx::setState(state
| BGFX_STATE_BLEND_ALPHA
);
break;
case 1:
// Set vertex and fragment shaders.
bgfx::setProgram(wbSeparatePass);
// Set render states.
bgfx::setState(state
| BGFX_STATE_BLEND_FUNC_SEPARATE(BGFX_STATE_BLEND_ONE, BGFX_STATE_BLEND_ONE, BGFX_STATE_BLEND_ZERO, BGFX_STATE_BLEND_INV_SRC_ALPHA)
);
break;
default:
// Set vertex and fragment shaders.
bgfx::setProgram(wbPass);
// Set render states.
bgfx::setState(state
| BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_ONE, BGFX_STATE_BLEND_ONE)
| BGFX_STATE_BLEND_INDEPENDENT
, 0
| BGFX_STATE_BLEND_FUNC_RT_1(BGFX_STATE_BLEND_ZERO, BGFX_STATE_BLEND_SRC_COLOR)
);
break;
}
// Submit primitive for rendering to view 0.
bgfx::submit(0);
}
}
}
if (0 != mode)
{
bgfx::setTexture(0, u_texColor0, fbtextures[0]);
bgfx::setTexture(1, u_texColor1, fbtextures[1]);
bgfx::setProgram(1 == mode ? wbSeparateBlit : wbBlit);
bgfx::setState(0
| BGFX_STATE_RGB_WRITE
| BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_INV_SRC_ALPHA, BGFX_STATE_BLEND_SRC_ALPHA)
);
screenSpaceQuad( (float)width, (float)height, s_flipV);
bgfx::submit(1);
}
// Advance to next frame. Rendering thread will be kicked to
// process submitted rendering primitives.
bgfx::frame();
}
// Cleanup.
imguiDestroy();
bgfx::destroyFrameBuffer(fbh);
bgfx::destroyIndexBuffer(ibh);
bgfx::destroyVertexBuffer(vbh);
bgfx::destroyProgram(blend);
bgfx::destroyProgram(wbSeparatePass);
bgfx::destroyProgram(wbSeparateBlit);
bgfx::destroyProgram(wbPass);
bgfx::destroyProgram(wbBlit);
bgfx::destroyUniform(u_texColor0);
bgfx::destroyUniform(u_texColor1);
bgfx::destroyUniform(u_color);
// Shutdown bgfx.
bgfx::shutdown();
return 0;
}
BX_NO_INLINE bool mainloop()
{
if (!entry::processEvents(width, height, debug, reset, &mouseState) )
{
int64_t now = bx::getHPCounter();
static int64_t last = now;
const int64_t hpFreq = bx::getHPFrequency();
const int64_t frameTime = now - last;
last = now;
const double freq = double(hpFreq);
const double toMs = 1000.0/freq;
deltaTimeNs += frameTime*1000000/hpFreq;
if (deltaTimeNs > 1000000)
{
deltaTimeAvgNs = deltaTimeNs / bx::int64_max(1, numFrames);
if (autoAdjust)
{
if (deltaTimeAvgNs < highwm)
{
dim = bx::uint32_min(dim + 2, 40);
}
else if (deltaTimeAvgNs > lowwm)
{
dim = bx::uint32_max(dim - 1, 2);
}
}
deltaTimeNs = 0;
numFrames = 0;
}
else
{
++numFrames;
}
float time = (float)( (now-timeOffset)/freq);
imguiBeginFrame(mouseState.m_mx
, mouseState.m_my
, (mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
| (mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
, 0
, width
, height
);
imguiBeginScrollArea("Settings", width - width / 4 - 10, 10, width / 4, height / 3, &scrollArea);
imguiSeparatorLine();
transform = imguiChoose(transform
, "Rotate"
, "No fragments"
);
imguiSeparatorLine();
if (imguiCheck("Auto adjust", autoAdjust) )
{
autoAdjust ^= true;
}
imguiSlider("Dim", dim, 5, 40);
imguiLabel("Draw calls: %d", dim*dim*dim);
imguiLabel("Avg Delta Time (1 second) [ms]: %0.4f", deltaTimeAvgNs/1000.0f);
imguiEndScrollArea();
imguiEndFrame();
float at[3] = { 0.0f, 0.0f, 0.0f };
float eye[3] = { 0.0f, 0.0f, -35.0f };
float view[16];
float proj[16];
bx::mtxLookAt(view, eye, at);
bx::mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
// Set view and projection matrix for view 0.
bgfx::setViewTransform(0, view, proj);
// Set view 0 default viewport.
bgfx::setViewRect(0, 0, 0, width, height);
// This dummy draw call is here to make sure that view 0 is cleared
// if no other draw calls are submitted to view 0.
bgfx::submit(0);
// Use debug font to print information about this example.
bgfx::dbgTextClear();
bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/17-drawstress");
bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Draw stress, maximizing number of draw calls.");
bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: %7.3f[ms]", double(frameTime)*toMs);
float mtxS[16];
const float scale = 0 == transform ? 0.25f : 0.0f;
bx::mtxScale(mtxS, scale, scale, scale);
const float step = 0.6f;
float pos[3];
pos[0] = -step*dim / 2.0f;
pos[1] = -step*dim / 2.0f;
pos[2] = -15.0;
for (uint32_t zz = 0; zz < uint32_t(dim); ++zz)
{
for (uint32_t yy = 0; yy < uint32_t(dim); ++yy)
{
for (uint32_t xx = 0; xx < uint32_t(dim); ++xx)
{
float mtxR[16];
bx::mtxRotateXYZ(mtxR, time + xx*0.21f, time + yy*0.37f, time + yy*0.13f);
float mtx[16];
bx::mtxMul(mtx, mtxS, mtxR);
mtx[12] = pos[0] + float(xx)*step;
mtx[13] = pos[1] + float(yy)*step;
mtx[14] = pos[2] + float(zz)*step;
// 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.
bgfx::setState(BGFX_STATE_DEFAULT);
// 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();
return false;
}
return true;
}
int _main_(int _argc, char** _argv)
{
Args args(_argc, _argv);
uint32_t width = 1280;
uint32_t height = 720;
uint32_t debug = BGFX_DEBUG_TEXT;
uint32_t reset = 0
| BGFX_RESET_VSYNC
| BGFX_RESET_MSAA_X16
;
bgfx::init(args.m_type, args.m_pciId);
bgfx::reset(width, height, reset);
// Enable debug text.
bgfx::setDebug(debug);
// Set views clear state.
bgfx::setViewClear(0
, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
, 0x303030ff
, 1.0f
, 0
);
// Imgui.
imguiCreate();
// Uniforms.
Uniforms uniforms;
uniforms.init();
// Vertex declarations.
PosColorTexCoord0Vertex::init();
LightProbe lightProbes[LightProbe::Count];
lightProbes[LightProbe::Bolonga].load("bolonga");
lightProbes[LightProbe::Kyoto ].load("kyoto");
LightProbe::Enum currentLightProbe = LightProbe::Bolonga;
bgfx::UniformHandle u_mtx = bgfx::createUniform("u_mtx", bgfx::UniformType::Mat4);
bgfx::UniformHandle u_params = bgfx::createUniform("u_params", bgfx::UniformType::Vec4);
bgfx::UniformHandle u_flags = bgfx::createUniform("u_flags", bgfx::UniformType::Vec4);
bgfx::UniformHandle u_camPos = bgfx::createUniform("u_camPos", bgfx::UniformType::Vec4);
bgfx::UniformHandle s_texCube = bgfx::createUniform("s_texCube", bgfx::UniformType::Int1);
bgfx::UniformHandle s_texCubeIrr = bgfx::createUniform("s_texCubeIrr", bgfx::UniformType::Int1);
bgfx::ProgramHandle programMesh = loadProgram("vs_ibl_mesh", "fs_ibl_mesh");
bgfx::ProgramHandle programSky = loadProgram("vs_ibl_skybox", "fs_ibl_skybox");
Mesh* meshBunny;
meshBunny = meshLoad("meshes/bunny.bin");
Mesh* meshOrb;
meshOrb = meshLoad("meshes/orb.bin");
Camera camera;
Mouse mouse;
struct Settings
{
Settings()
{
m_envRotCurr = 0.0f;
m_envRotDest = 0.0f;
m_lightDir[0] = -0.8f;
m_lightDir[1] = 0.2f;
m_lightDir[2] = -0.5f;
m_lightCol[0] = 1.0f;
m_lightCol[1] = 1.0f;
m_lightCol[2] = 1.0f;
m_glossiness = 0.7f;
m_exposure = 0.0f;
m_bgType = 3.0f;
m_radianceSlider = 2.0f;
m_reflectivity = 0.85f;
m_rgbDiff[0] = 1.0f;
m_rgbDiff[1] = 1.0f;
m_rgbDiff[2] = 1.0f;
m_rgbSpec[0] = 1.0f;
m_rgbSpec[1] = 1.0f;
m_rgbSpec[2] = 1.0f;
m_lod = 0.0f;
m_doDiffuse = false;
m_doSpecular = false;
m_doDiffuseIbl = true;
m_doSpecularIbl = true;
m_showLightColorWheel = true;
m_showDiffColorWheel = true;
m_showSpecColorWheel = true;
m_metalOrSpec = 0;
m_meshSelection = 0;
m_crossCubemapPreview = ImguiCubemap::Latlong;
}
float m_envRotCurr;
float m_envRotDest;
float m_lightDir[3];
float m_lightCol[3];
float m_glossiness;
float m_exposure;
float m_radianceSlider;
float m_bgType;
float m_reflectivity;
float m_rgbDiff[3];
float m_rgbSpec[3];
float m_lod;
bool m_doDiffuse;
bool m_doSpecular;
bool m_doDiffuseIbl;
bool m_doSpecularIbl;
bool m_showLightColorWheel;
bool m_showDiffColorWheel;
bool m_showSpecColorWheel;
uint8_t m_metalOrSpec;
uint8_t m_meshSelection;
ImguiCubemap::Enum m_crossCubemapPreview;
};
Settings settings;
int32_t leftScrollArea = 0;
entry::MouseState mouseState;
while (!entry::processEvents(width, height, debug, reset, &mouseState) )
{
imguiBeginFrame(mouseState.m_mx
, mouseState.m_my
, (mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
| (mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
| (mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
, mouseState.m_mz
, uint16_t(width)
, uint16_t(height)
);
static int32_t rightScrollArea = 0;
imguiBeginScrollArea("", width - 256 - 10, 10, 256, 700, &rightScrollArea);
imguiLabel("Environment light:");
imguiIndent();
imguiBool("IBL Diffuse", settings.m_doDiffuseIbl);
imguiBool("IBL Specular", settings.m_doSpecularIbl);
currentLightProbe = LightProbe::Enum(imguiTabs(
uint8_t(currentLightProbe)
, true
, ImguiAlign::LeftIndented
, 16
, 2
, 2
, "Bolonga"
, "Kyoto"
) );
if (imguiCube(lightProbes[currentLightProbe].m_tex, settings.m_lod, settings.m_crossCubemapPreview, true) )
{
settings.m_crossCubemapPreview = ImguiCubemap::Enum( (settings.m_crossCubemapPreview+1) % ImguiCubemap::Count);
}
imguiSlider("Texture LOD", settings.m_lod, 0.0f, 10.1f, 0.1f);
imguiUnindent();
imguiSeparator(8);
imguiLabel("Directional light:");
imguiIndent();
imguiBool("Diffuse", settings.m_doDiffuse);
imguiBool("Specular", settings.m_doSpecular);
const bool doDirectLighting = settings.m_doDiffuse || settings.m_doSpecular;
imguiSlider("Light direction X", settings.m_lightDir[0], -1.0f, 1.0f, 0.1f, doDirectLighting);
imguiSlider("Light direction Y", settings.m_lightDir[1], -1.0f, 1.0f, 0.1f, doDirectLighting);
imguiSlider("Light direction Z", settings.m_lightDir[2], -1.0f, 1.0f, 0.1f, doDirectLighting);
imguiColorWheel("Color:", settings.m_lightCol, settings.m_showLightColorWheel, 0.6f, doDirectLighting);
imguiUnindent();
imguiSeparator(8);
imguiLabel("Background:");
imguiIndent();
{
int32_t selection;
if (0.0f == settings.m_bgType) { selection = UINT8_C(0); }
else if (7.0f == settings.m_bgType) { selection = UINT8_C(2); }
else { selection = UINT8_C(1); }
selection = imguiTabs(
uint8_t(selection)
, true
, ImguiAlign::LeftIndented
, 16
, 2
, 3
, "Skybox"
, "Radiance"
, "Irradiance"
);
if (0 == selection) { settings.m_bgType = 0.0f; }
else if (2 == selection) { settings.m_bgType = 7.0f; }
else { settings.m_bgType = settings.m_radianceSlider; }
const bool isRadiance = (selection == 1);
imguiSlider("Mip level", settings.m_radianceSlider, 1.0f, 6.0f, 0.1f, isRadiance);
}
imguiUnindent();
imguiSeparator(8);
imguiLabel("Post processing:");
imguiIndent();
imguiSlider("Exposure", settings.m_exposure, -4.0f, 4.0f, 0.1f);
imguiUnindent();
imguiSeparator();
imguiEndScrollArea();
imguiBeginScrollArea("", 10, 70, 256, 636, &leftScrollArea);
imguiLabel("Mesh:");
imguiIndent();
settings.m_meshSelection = uint8_t(imguiChoose(settings.m_meshSelection, "Bunny", "Orbs") );
imguiUnindent();
const bool isBunny = (0 == settings.m_meshSelection);
if (!isBunny)
{
settings.m_metalOrSpec = 0;
}
imguiSeparator(4);
imguiLabel("Workflow:");
imguiIndent();
if (imguiCheck("Metalness", 0 == settings.m_metalOrSpec, isBunny) ) { settings.m_metalOrSpec = 0; }
if (imguiCheck("Specular", 1 == settings.m_metalOrSpec, isBunny) ) { settings.m_metalOrSpec = 1; }
imguiUnindent();
imguiSeparator(4);
imguiLabel("Material:");
imguiIndent();
imguiSlider("Glossiness", settings.m_glossiness, 0.0f, 1.0f, 0.01f, isBunny);
imguiSlider(0 == settings.m_metalOrSpec ? "Metalness" : "Diffuse - Specular", settings.m_reflectivity, 0.0f, 1.0f, 0.01f, isBunny);
imguiUnindent();
imguiColorWheel("Diffuse:", &settings.m_rgbDiff[0], settings.m_showDiffColorWheel, 0.7f);
imguiSeparator();
imguiColorWheel("Specular:", &settings.m_rgbSpec[0], settings.m_showSpecColorWheel, 0.7f, (1 == settings.m_metalOrSpec) && isBunny);
imguiEndScrollArea();
imguiEndFrame();
uniforms.m_glossiness = settings.m_glossiness;
uniforms.m_reflectivity = settings.m_reflectivity;
uniforms.m_exposure = settings.m_exposure;
uniforms.m_bgType = settings.m_bgType;
uniforms.m_metalOrSpec = float(settings.m_metalOrSpec);
uniforms.m_doDiffuse = float(settings.m_doDiffuse);
uniforms.m_doSpecular = float(settings.m_doSpecular);
uniforms.m_doDiffuseIbl = float(settings.m_doDiffuseIbl);
uniforms.m_doSpecularIbl = float(settings.m_doSpecularIbl);
bx::memCopy(uniforms.m_rgbDiff, settings.m_rgbDiff, 3*sizeof(float) );
bx::memCopy(uniforms.m_rgbSpec, settings.m_rgbSpec, 3*sizeof(float) );
bx::memCopy(uniforms.m_lightDir, settings.m_lightDir, 3*sizeof(float) );
bx::memCopy(uniforms.m_lightCol, settings.m_lightCol, 3*sizeof(float) );
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 deltaTimeSec = float(double(frameTime)/freq);
// Use debug font to print information about this example.
bgfx::dbgTextClear();
bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/18-ibl");
bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Image-based lighting.");
bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
// Camera.
const bool mouseOverGui = imguiMouseOverArea();
mouse.update(float(mouseState.m_mx), float(mouseState.m_my), mouseState.m_mz, width, height);
if (!mouseOverGui)
{
if (mouseState.m_buttons[entry::MouseButton::Left])
{
camera.orbit(mouse.m_dx, mouse.m_dy);
}
else if (mouseState.m_buttons[entry::MouseButton::Right])
{
camera.dolly(mouse.m_dx + mouse.m_dy);
}
else if (mouseState.m_buttons[entry::MouseButton::Middle])
{
settings.m_envRotDest += mouse.m_dx*2.0f;
}
else if (0 != mouse.m_scroll)
{
camera.dolly(float(mouse.m_scroll)*0.05f);
}
}
camera.update(deltaTimeSec);
bx::memCopy(uniforms.m_cameraPos, camera.m_pos.curr, 3*sizeof(float) );
// View Transform 0.
float view[16];
float proj[16];
bx::mtxIdentity(view);
bx::mtxOrtho(proj, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 100.0f);
bgfx::setViewTransform(0, view, proj);
// View Transform 1.
camera.mtxLookAt(view);
bx::mtxProj(proj, 45.0f, float(width)/float(height), 0.1f, 100.0f, bgfx::getCaps()->homogeneousDepth);
bgfx::setViewTransform(1, view, proj);
// View rect.
bgfx::setViewRect(0, 0, 0, uint16_t(width), uint16_t(height) );
bgfx::setViewRect(1, 0, 0, uint16_t(width), uint16_t(height) );
// Env rotation.
const float amount = bx::fmin(deltaTimeSec/0.12f, 1.0f);
settings.m_envRotCurr = bx::flerp(settings.m_envRotCurr, settings.m_envRotDest, amount);
// Env mtx.
float mtxEnvView[16];
camera.envViewMtx(mtxEnvView);
float mtxEnvRot[16];
bx::mtxRotateY(mtxEnvRot, settings.m_envRotCurr);
bx::mtxMul(uniforms.m_mtx, mtxEnvView, mtxEnvRot); // Used for Skybox.
// Submit view 0.
bgfx::setTexture(0, s_texCube, lightProbes[currentLightProbe].m_tex);
bgfx::setTexture(1, s_texCubeIrr, lightProbes[currentLightProbe].m_texIrr);
bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
screenSpaceQuad( (float)width, (float)height, true);
uniforms.submit();
bgfx::submit(0, programSky);
// Submit view 1.
bx::memCopy(uniforms.m_mtx, mtxEnvRot, 16*sizeof(float)); // Used for IBL.
if (0 == settings.m_meshSelection)
{
// Submit bunny.
float mtx[16];
bx::mtxSRT(mtx, 1.0f, 1.0f, 1.0f, 0.0f, bx::pi, 0.0f, 0.0f, -0.80f, 0.0f);
bgfx::setTexture(0, s_texCube, lightProbes[currentLightProbe].m_tex);
bgfx::setTexture(1, s_texCubeIrr, lightProbes[currentLightProbe].m_texIrr);
uniforms.submit();
meshSubmit(meshBunny, 1, programMesh, mtx);
}
else
{
// Submit orbs.
for (float yy = 0, yend = 5.0f; yy < yend; yy+=1.0f)
{
for (float xx = 0, xend = 5.0f; xx < xend; xx+=1.0f)
{
const float scale = 1.2f;
const float spacing = 2.2f;
const float yAdj = -0.8f;
float mtx[16];
bx::mtxSRT(mtx
, scale/xend
, scale/xend
, scale/xend
, 0.0f
, 0.0f
, 0.0f
, 0.0f + (xx/xend)*spacing - (1.0f + (scale-1.0f)*0.5f - 1.0f/xend)
, yAdj/yend + (yy/yend)*spacing - (1.0f + (scale-1.0f)*0.5f - 1.0f/yend)
, 0.0f
);
uniforms.m_glossiness = xx*(1.0f/xend);
uniforms.m_reflectivity = (yend-yy)*(1.0f/yend);
uniforms.m_metalOrSpec = 0.0f;
uniforms.submit();
bgfx::setTexture(0, s_texCube, lightProbes[currentLightProbe].m_tex);
bgfx::setTexture(1, s_texCubeIrr, lightProbes[currentLightProbe].m_texIrr);
meshSubmit(meshOrb, 1, programMesh, mtx);
}
}
}
// Advance to next frame. Rendering thread will be kicked to
// process submitted rendering primitives.
bgfx::frame();
}
meshUnload(meshBunny);
meshUnload(meshOrb);
// Cleanup.
bgfx::destroyProgram(programMesh);
bgfx::destroyProgram(programSky);
bgfx::destroyUniform(u_camPos);
bgfx::destroyUniform(u_flags);
bgfx::destroyUniform(u_params);
bgfx::destroyUniform(u_mtx);
bgfx::destroyUniform(s_texCube);
bgfx::destroyUniform(s_texCubeIrr);
for (uint8_t ii = 0; ii < LightProbe::Count; ++ii)
{
lightProbes[ii].destroy();
}
uniforms.destroy();
imguiDestroy();
// Shutdown bgfx.
bgfx::shutdown();
return 0;
}
int _main_(int _argc, char** _argv)
{
Args args(_argc, _argv);
uint32_t width = 1280;
uint32_t height = 720;
uint32_t debug = BGFX_DEBUG_TEXT;
uint32_t reset = BGFX_RESET_VSYNC;
bgfx::init(args.m_type, args.m_pciId);
bgfx::reset(width, height, reset);
// Enable debug text.
bgfx::setDebug(debug);
// Set views clear state.
bgfx::setViewClear(0
, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
, 0x303030ff
, 1.0f
, 0
);
// Imgui.
imguiCreate();
// Uniforms.
s_uniforms.init();
// Vertex declarations.
PosColorTexCoord0Vertex::init();
LightProbe lightProbes[LightProbe::Count];
lightProbes[LightProbe::Wells ].load("wells");
lightProbes[LightProbe::Uffizi].load("uffizi");
lightProbes[LightProbe::Pisa ].load("pisa");
lightProbes[LightProbe::Ennis ].load("ennis");
lightProbes[LightProbe::Grace ].load("grace");
LightProbe::Enum currentLightProbe = LightProbe::Wells;
bgfx::UniformHandle u_mtx = bgfx::createUniform("u_mtx", bgfx::UniformType::Mat4);
bgfx::UniformHandle u_params = bgfx::createUniform("u_params", bgfx::UniformType::Vec4);
bgfx::UniformHandle u_flags = bgfx::createUniform("u_flags", bgfx::UniformType::Vec4);
bgfx::UniformHandle u_camPos = bgfx::createUniform("u_camPos", bgfx::UniformType::Vec4);
bgfx::UniformHandle s_texCube = bgfx::createUniform("s_texCube", bgfx::UniformType::Int1);
bgfx::UniformHandle s_texCubeIrr = bgfx::createUniform("s_texCubeIrr", bgfx::UniformType::Int1);
bgfx::ProgramHandle programMesh = loadProgram("vs_ibl_mesh", "fs_ibl_mesh");
bgfx::ProgramHandle programSky = loadProgram("vs_ibl_skybox", "fs_ibl_skybox");
Mesh* meshBunny;
meshBunny = meshLoad("meshes/bunny.bin");
struct Settings
{
float m_speed;
float m_glossiness;
float m_exposure;
float m_diffspec;
float m_rgbDiff[3];
float m_rgbSpec[3];
bool m_diffuse;
bool m_specular;
bool m_diffuseIbl;
bool m_specularIbl;
bool m_showDiffColorWheel;
bool m_showSpecColorWheel;
ImguiCubemap::Enum m_crossCubemapPreview;
};
Settings settings;
settings.m_speed = 0.37f;
settings.m_glossiness = 1.0f;
settings.m_exposure = 0.0f;
settings.m_diffspec = 0.65f;
settings.m_rgbDiff[0] = 0.2f;
settings.m_rgbDiff[1] = 0.2f;
settings.m_rgbDiff[2] = 0.2f;
settings.m_rgbSpec[0] = 1.0f;
settings.m_rgbSpec[1] = 1.0f;
settings.m_rgbSpec[2] = 1.0f;
settings.m_diffuse = true;
settings.m_specular = true;
settings.m_diffuseIbl = true;
settings.m_specularIbl = true;
settings.m_showDiffColorWheel = true;
settings.m_showSpecColorWheel = false;
settings.m_crossCubemapPreview = ImguiCubemap::Cross;
float time = 0.0f;
int32_t leftScrollArea = 0;
entry::MouseState mouseState;
while (!entry::processEvents(width, height, debug, reset, &mouseState) )
{
imguiBeginFrame(mouseState.m_mx
, mouseState.m_my
, (mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
| (mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
| (mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
, mouseState.m_mz
, width
, height
);
static int32_t rightScrollArea = 0;
imguiBeginScrollArea("Settings", width - 256 - 10, 10, 256, 540, &rightScrollArea);
imguiLabel("Shade:");
imguiSeparator();
imguiBool("Diffuse", settings.m_diffuse);
imguiBool("Specular", settings.m_specular);
imguiBool("IBL Diffuse", settings.m_diffuseIbl);
imguiBool("IBL Specular", settings.m_specularIbl);
imguiSeparatorLine();
imguiSlider("Speed", settings.m_speed, 0.0f, 1.0f, 0.01f);
imguiSeparatorLine();
imguiSeparator();
imguiSlider("Exposure", settings.m_exposure, -8.0f, 8.0f, 0.01f);
imguiSeparator();
imguiLabel("Environment:");
currentLightProbe = LightProbe::Enum(imguiChoose(currentLightProbe
, "Wells"
, "Uffizi"
, "Pisa"
, "Ennis"
, "Grace"
) );
static float lod = 0.0f;
if (imguiCube(lightProbes[currentLightProbe].m_tex, lod, settings.m_crossCubemapPreview, true) )
{
settings.m_crossCubemapPreview = ImguiCubemap::Enum( (settings.m_crossCubemapPreview+1) % ImguiCubemap::Count);
}
imguiSlider("Texture LOD", lod, 0.0f, 10.1f, 0.1f);
imguiEndScrollArea();
imguiBeginScrollArea("Settings", 10, 70, 256, 576, &leftScrollArea);
imguiLabel("Material properties:");
imguiSeparator();
imguiSlider("Diffuse - Specular", settings.m_diffspec, 0.0f, 1.0f, 0.01f);
imguiSlider("Glossiness" , settings.m_glossiness, 0.0f, 1.0f, 0.01f);
imguiSeparator();
imguiColorWheel("Diffuse color:", &settings.m_rgbDiff[0], settings.m_showDiffColorWheel);
imguiSeparator();
imguiColorWheel("Specular color:", &settings.m_rgbSpec[0], settings.m_showSpecColorWheel);
imguiSeparator();
imguiLabel("Predefined materials:");
imguiSeparator();
if (imguiButton("Gold") )
{
settings.m_glossiness = 0.8f;
settings.m_diffspec = 1.0f;
settings.m_rgbDiff[0] = 0.0f;
settings.m_rgbDiff[1] = 0.0f;
settings.m_rgbDiff[2] = 0.0f;
settings.m_rgbSpec[0] = 1.0f;
settings.m_rgbSpec[1] = 0.86f;
settings.m_rgbSpec[2] = 0.58f;
}
if (imguiButton("Copper") )
{
settings.m_glossiness = 0.67f;
settings.m_diffspec = 1.0f;
settings.m_rgbDiff[0] = 0.0f;
settings.m_rgbDiff[1] = 0.0f;
settings.m_rgbDiff[2] = 0.0f;
settings.m_rgbSpec[0] = 0.98f;
settings.m_rgbSpec[1] = 0.82f;
settings.m_rgbSpec[2] = 0.76f;
}
if (imguiButton("Titanium") )
{
settings.m_glossiness = 0.57f;
settings.m_diffspec = 1.0f;
settings.m_rgbDiff[0] = 0.0f;
settings.m_rgbDiff[1] = 0.0f;
settings.m_rgbDiff[2] = 0.0f;
settings.m_rgbSpec[0] = 0.76f;
settings.m_rgbSpec[1] = 0.73f;
settings.m_rgbSpec[2] = 0.71f;
}
if (imguiButton("Steel") )
{
settings.m_glossiness = 0.82f;
settings.m_diffspec = 1.0f;
settings.m_rgbDiff[0] = 0.0f;
settings.m_rgbDiff[1] = 0.0f;
settings.m_rgbDiff[2] = 0.0f;
settings.m_rgbSpec[0] = 0.77f;
settings.m_rgbSpec[1] = 0.78f;
settings.m_rgbSpec[2] = 0.77f;
}
imguiEndScrollArea();
imguiEndFrame();
s_uniforms.m_glossiness = settings.m_glossiness;
s_uniforms.m_exposure = settings.m_exposure;
s_uniforms.m_diffspec = settings.m_diffspec;
s_uniforms.m_flags[0] = float(settings.m_diffuse);
s_uniforms.m_flags[1] = float(settings.m_specular);
s_uniforms.m_flags[2] = float(settings.m_diffuseIbl);
s_uniforms.m_flags[3] = float(settings.m_specularIbl);
memcpy(s_uniforms.m_rgbDiff, settings.m_rgbDiff, 3*sizeof(float) );
memcpy(s_uniforms.m_rgbSpec, settings.m_rgbSpec, 3*sizeof(float) );
s_uniforms.submitPerFrameUniforms();
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;
time += (float)(frameTime*settings.m_speed/freq);
s_uniforms.m_camPosTime[3] = time;
// Use debug font to print information about this example.
bgfx::dbgTextClear();
bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/18-ibl");
bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Image based lightning.");
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, -3.0f };
bx::mtxRotateXY(s_uniforms.m_mtx
, 0.0f
, time
);
float view[16];
float proj[16];
bx::mtxIdentity(view);
bx::mtxOrtho(proj, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 100.0f);
bgfx::setViewTransform(0, view, proj);
bx::mtxLookAt(view, eye, at);
memcpy(s_uniforms.m_camPosTime, eye, 3*sizeof(float) );
bx::mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
bgfx::setViewTransform(1, view, proj);
bgfx::setViewRect(0, 0, 0, width, height);
bgfx::setViewRect(1, 0, 0, width, height);
// View 0.
bgfx::setTexture(0, s_texCube, lightProbes[currentLightProbe].m_tex);
bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
screenSpaceQuad( (float)width, (float)height, true);
s_uniforms.submitPerDrawUniforms();
bgfx::submit(0, programSky);
// View 1.
float mtx[16];
bx::mtxSRT(mtx
, 1.0f
, 1.0f
, 1.0f
, 0.0f
, bx::pi+time
, 0.0f
, 0.0f
, -1.0f
, 0.0f
);
bgfx::setTexture(0, s_texCube, lightProbes[currentLightProbe].m_tex);
bgfx::setTexture(1, s_texCubeIrr, lightProbes[currentLightProbe].m_texIrr);
meshSubmit(meshBunny, 1, programMesh, mtx);
// Advance to next frame. Rendering thread will be kicked to
// process submitted rendering primitives.
bgfx::frame();
}
meshUnload(meshBunny);
// Cleanup.
bgfx::destroyProgram(programMesh);
bgfx::destroyProgram(programSky);
bgfx::destroyUniform(u_camPos);
bgfx::destroyUniform(u_flags);
bgfx::destroyUniform(u_params);
bgfx::destroyUniform(u_mtx);
bgfx::destroyUniform(s_texCube);
bgfx::destroyUniform(s_texCubeIrr);
for (uint8_t ii = 0; ii < LightProbe::Count; ++ii)
{
lightProbes[ii].destroy();
}
s_uniforms.destroy();
imguiDestroy();
// Shutdown bgfx.
bgfx::shutdown();
return 0;
}
int _main_(int /*_argc*/, char** /*_argv*/)
{
uint32_t width = 1280;
uint32_t height = 720;
uint32_t debug = BGFX_DEBUG_TEXT;
uint32_t reset = BGFX_RESET_VSYNC;
bgfx::init();
bgfx::reset(width, height, reset);
// Enable debug text.
bgfx::setDebug(debug);
// Set view 0 clear state.
bgfx::setViewClear(0
, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
, 0x303030ff
, 1.0f
, 0
);
const bgfx::Caps* caps = bgfx::getCaps();
const bool computeSupported = !!(caps->supported & BGFX_CAPS_COMPUTE);
const bool indirectSupported = !!(caps->supported & BGFX_CAPS_DRAW_INDIRECT);
if (computeSupported)
{
// Imgui.
imguiCreate();
bgfx::VertexDecl quadVertexDecl;
quadVertexDecl.begin()
.add(bgfx::Attrib::Position, 2, bgfx::AttribType::Float)
.end();
// Create static vertex buffer.
bgfx::VertexBufferHandle vbh = bgfx::createVertexBuffer(
// Static data can be passed with bgfx::makeRef
bgfx::makeRef(s_quadVertices, sizeof(s_quadVertices) )
, quadVertexDecl
);
// Create static index buffer.
bgfx::IndexBufferHandle ibh = bgfx::createIndexBuffer(
// Static data can be passed with bgfx::makeRef
bgfx::makeRef(s_quadIndices, sizeof(s_quadIndices) )
);
// Create particle program from shaders.
bgfx::ProgramHandle particleProgram = loadProgram("vs_particle", "fs_particle");
// Setup compute buffers
bgfx::VertexDecl computeVertexDecl;
computeVertexDecl.begin()
.add(bgfx::Attrib::TexCoord0, 4, bgfx::AttribType::Float)
.end();
const uint32_t threadGroupUpdateSize = 512;
const uint32_t maxParticleCount = 32 * 1024;
bgfx::DynamicVertexBufferHandle currPositionBuffer0 = bgfx::createDynamicVertexBuffer(1 << 15, computeVertexDecl, BGFX_BUFFER_COMPUTE_READ_WRITE);
bgfx::DynamicVertexBufferHandle currPositionBuffer1 = bgfx::createDynamicVertexBuffer(1 << 15, computeVertexDecl, BGFX_BUFFER_COMPUTE_READ_WRITE);
bgfx::DynamicVertexBufferHandle prevPositionBuffer0 = bgfx::createDynamicVertexBuffer(1 << 15, computeVertexDecl, BGFX_BUFFER_COMPUTE_READ_WRITE);
bgfx::DynamicVertexBufferHandle prevPositionBuffer1 = bgfx::createDynamicVertexBuffer(1 << 15, computeVertexDecl, BGFX_BUFFER_COMPUTE_READ_WRITE);
bgfx::UniformHandle u_params = bgfx::createUniform("u_params", bgfx::UniformType::Vec4, 3);
bgfx::ProgramHandle initInstancesProgram = bgfx::createProgram(loadShader("cs_init_instances"), true);
bgfx::ProgramHandle updateInstancesProgram = bgfx::createProgram(loadShader("cs_update_instances"), true);
bgfx::ProgramHandle indirectProgram = BGFX_INVALID_HANDLE;
bgfx::IndirectBufferHandle indirectBuffer = BGFX_INVALID_HANDLE;
if (indirectSupported)
{
indirectProgram = bgfx::createProgram(loadShader("cs_indirect"), true);
indirectBuffer = bgfx::createIndirectBuffer(2);
}
u_paramsDataStruct u_paramsData;
InitializeParams(0, &u_paramsData);
bgfx::setUniform(u_params, &u_paramsData, 3);
bgfx::setBuffer(0, prevPositionBuffer0, bgfx::Access::Write);
bgfx::setBuffer(1, currPositionBuffer0, bgfx::Access::Write);
bgfx::dispatch(0, initInstancesProgram, maxParticleCount / threadGroupUpdateSize, 1, 1);
float view[16];
float initialPos[3] = { 0.0f, 0.0f, -45.0f };
cameraCreate();
cameraSetPosition(initialPos);
cameraSetVerticalAngle(0.0f);
cameraGetViewMtx(view);
int32_t scrollArea = 0;
bool useIndirect = false;
entry::MouseState mouseState;
while (!entry::processEvents(width, height, debug, reset, &mouseState) )
{
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 float deltaTime = float(frameTime/freq);
if (deltaTime > 1000.0)
{
abort();
}
// Set view 0 default viewport.
bgfx::setViewRect(0, 0, 0, width, height);
// Use debug font to print information about this example.
bgfx::dbgTextClear();
bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/24-nbody");
bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: N-body simulation with compute shaders using buffers.");
imguiBeginFrame(mouseState.m_mx
, mouseState.m_my
, (mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
| (mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
, mouseState.m_mz
, width
, height
);
imguiBeginScrollArea("Settings", width - width / 4 - 10, 10, width / 4, 500, &scrollArea);
imguiSlider("Random seed", u_paramsData.baseSeed, 0, 100);
int32_t shape = imguiChoose(u_paramsData.initialShape, "Point", "Sphere", "Box", "Donut");
imguiSlider("Initial speed", u_paramsData.initialSpeed, 0.0f, 300.0f, 0.1f);
bool defaults = imguiButton("Reset");
imguiSeparatorLine();
imguiSlider("Particle count (x512)", u_paramsData.dispatchSize, 1, 64);
imguiSlider("Gravity", u_paramsData.gravity, 0.0f, 0.3f, 0.001f);
imguiSlider("Damping", u_paramsData.damping, 0.0f, 1.0f, 0.01f);
imguiSlider("Max acceleration", u_paramsData.maxAccel, 0.0f, 100.0f, 0.01f);
imguiSlider("Time step", u_paramsData.timeStep, 0.0f, 0.02f, 0.0001f);
imguiSeparatorLine();
imguiSlider("Particle intensity", u_paramsData.particleIntensity, 0.0f, 1.0f, 0.001f);
imguiSlider("Particle size", u_paramsData.particleSize, 0.0f, 1.0f, 0.001f);
imguiSlider("Particle power", u_paramsData.particlePower, 0.001f, 16.0f, 0.01f);
imguiSeparatorLine();
if (imguiCheck("Use draw/dispatch indirect", useIndirect, indirectSupported) )
{
useIndirect = !useIndirect;
}
imguiEndScrollArea();
imguiEndFrame();
// Modify parameters and reset if shape is changed
if (shape != u_paramsData.initialShape)
{
defaults = true;
InitializeParams(shape, &u_paramsData);
}
if (defaults)
{
bgfx::setBuffer(0, prevPositionBuffer0, bgfx::Access::Write);
bgfx::setBuffer(1, currPositionBuffer0, bgfx::Access::Write);
bgfx::setUniform(u_params, &u_paramsData, 3);
bgfx::dispatch(0, initInstancesProgram, maxParticleCount / threadGroupUpdateSize, 1, 1);
}
if (useIndirect)
{
bgfx::setUniform(u_params, &u_paramsData, 3);
bgfx::setBuffer(0, indirectBuffer, bgfx::Access::Write);
bgfx::dispatch(0, indirectProgram);
}
bgfx::setBuffer(0, prevPositionBuffer0, bgfx::Access::Read);
bgfx::setBuffer(1, currPositionBuffer0, bgfx::Access::Read);
bgfx::setBuffer(2, prevPositionBuffer1, bgfx::Access::Write);
bgfx::setBuffer(3, currPositionBuffer1, bgfx::Access::Write);
bgfx::setUniform(u_params, &u_paramsData, 3);
if (useIndirect)
{
bgfx::dispatch(0, updateInstancesProgram, indirectBuffer, 1);
}
else
{
bgfx::dispatch(0, updateInstancesProgram, u_paramsData.dispatchSize, 1, 1);
}
bx::xchg(currPositionBuffer0, currPositionBuffer1);
bx::xchg(prevPositionBuffer0, prevPositionBuffer1);
// Update camera.
cameraUpdate(deltaTime, mouseState);
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);
float proj[16];
bx::mtxProj(proj, hmd->eye[0].fov, 0.1f, 10000.0f);
bgfx::setViewTransform(0, tmp, 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 proj[16];
bx::mtxProj(proj, 90.0f, float(width)/float(height), 0.1f, 10000.0f);
bgfx::setViewTransform(0, view, proj);
// Set view 0 default viewport.
bgfx::setViewRect(0, 0, 0, width, height);
}
// Set vertex and index buffer.
bgfx::setVertexBuffer(vbh);
bgfx::setIndexBuffer(ibh);
bgfx::setInstanceDataBuffer(currPositionBuffer0, 0, u_paramsData.dispatchSize * threadGroupUpdateSize);
// Set render states.
bgfx::setState(0
| BGFX_STATE_RGB_WRITE
| BGFX_STATE_BLEND_ADD
| BGFX_STATE_DEPTH_TEST_ALWAYS
);
// Submit primitive for rendering to view 0.
if (useIndirect)
{
bgfx::submit(0, particleProgram, indirectBuffer, 0);
}
else
{
bgfx::submit(0, particleProgram);
}
// Advance to next frame. Rendering thread will be kicked to
// process submitted rendering primitives.
bgfx::frame();
}
// Cleanup.
cameraDestroy();
imguiDestroy();
if (indirectSupported)
{
bgfx::destroyProgram(indirectProgram);
bgfx::destroyIndirectBuffer(indirectBuffer);
}
bgfx::destroyUniform(u_params);
bgfx::destroyDynamicVertexBuffer(currPositionBuffer0);
bgfx::destroyDynamicVertexBuffer(currPositionBuffer1);
bgfx::destroyDynamicVertexBuffer(prevPositionBuffer0);
bgfx::destroyDynamicVertexBuffer(prevPositionBuffer1);
bgfx::destroyProgram(updateInstancesProgram);
bgfx::destroyProgram(initInstancesProgram);
bgfx::destroyIndexBuffer(ibh);
bgfx::destroyVertexBuffer(vbh);
bgfx::destroyProgram(particleProgram);
}
else
{
int64_t timeOffset = bx::getHPCounter();
entry::MouseState mouseState;
while (!entry::processEvents(width, height, debug, reset, &mouseState) )
{
int64_t now = bx::getHPCounter();
float time = (float)( (now - timeOffset)/double(bx::getHPFrequency() ) );
bgfx::setViewRect(0, 0, 0, width, height);
bgfx::dbgTextClear();
bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/24-nbody");
bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: N-body simulation with compute shaders using buffers.");
bool blink = uint32_t(time*3.0f)&1;
bgfx::dbgTextPrintf(0, 5, blink ? 0x1f : 0x01, " Compute is not supported by GPU. ");
bgfx::touch(0);
bgfx::frame();
}
}
// Shutdown bgfx.
bgfx::shutdown();
return 0;
}
