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-rw-r--r--3rdparty/bgfx/examples/24-nbody/nbody.cpp563
1 files changed, 319 insertions, 244 deletions
diff --git a/3rdparty/bgfx/examples/24-nbody/nbody.cpp b/3rdparty/bgfx/examples/24-nbody/nbody.cpp
index 0350ab5bb76..4d285d81739 100644
--- a/3rdparty/bgfx/examples/24-nbody/nbody.cpp
+++ b/3rdparty/bgfx/examples/24-nbody/nbody.cpp
@@ -9,7 +9,18 @@
#include "camera.h"
#include <bgfx/bgfx.h>
-struct u_paramsDataStruct
+namespace
+{
+
+static const char* s_shapeNames[] =
+{
+ "Point",
+ "Sphere",
+ "Box",
+ "Donut"
+};
+
+struct ParamsData
{
float timeStep;
int32_t dispatchSize;
@@ -24,7 +35,7 @@ struct u_paramsDataStruct
float maxAccel;
};
-void InitializeParams(int32_t _mode, u_paramsDataStruct* _params)
+void initializeParams(int32_t _mode, ParamsData* _params)
{
switch(_mode)
{
@@ -96,308 +107,372 @@ static const float s_quadVertices[] =
static const uint16_t s_quadIndices[] = { 0, 1, 2, 2, 3, 0, };
-int _main_(int _argc, char** _argv)
+const uint32_t kThreadGroupUpdateSize = 512;
+const uint32_t kMaxParticleCount = 32 * 1024;
+
+class ExampleNbody : public entry::AppI
{
- Args args(_argc, _argv);
+public:
+ ExampleNbody(const char* _name, const char* _description)
+ : entry::AppI(_name, _description)
+ {
+ }
+
+ void init(int32_t _argc, const char* const* _argv, uint32_t _width, uint32_t _height) override
+ {
+ Args args(_argc, _argv);
- uint32_t width = 1280;
- uint32_t height = 720;
- uint32_t debug = BGFX_DEBUG_TEXT;
- uint32_t reset = BGFX_RESET_VSYNC;
+ m_width = _width;
+ m_height = _height;
+ m_debug = BGFX_DEBUG_NONE;
+ m_reset = BGFX_RESET_VSYNC;
- bgfx::init(args.m_type, args.m_pciId);
- bgfx::reset(width, height, reset);
+ bgfx::init(args.m_type, args.m_pciId);
+ bgfx::reset(m_width, m_height, m_reset);
- // Enable debug text.
- bgfx::setDebug(debug);
+ // 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
- );
+ // 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);
+ const bgfx::Caps* caps = bgfx::getCaps();
+ m_computeSupported = !!(caps->supported & BGFX_CAPS_COMPUTE);
+ m_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();
+ if (m_computeSupported)
+ {
+ bgfx::VertexDecl quadVertexDecl;
+ quadVertexDecl.begin()
+ .add(bgfx::Attrib::Position, 2, bgfx::AttribType::Float)
+ .end();
- // Create static vertex buffer.
- bgfx::VertexBufferHandle vbh = bgfx::createVertexBuffer(
+ // Create static vertex buffer.
+ m_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(
+ // Create static index buffer.
+ m_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");
+ // Create particle program from shaders.
+ m_particleProgram = loadProgram("vs_particle", "fs_particle");
- // Setup compute buffers
- bgfx::VertexDecl computeVertexDecl;
- computeVertexDecl.begin()
- .add(bgfx::Attrib::TexCoord0, 4, bgfx::AttribType::Float)
- .end();
+ // 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;
+ m_currPositionBuffer0 = bgfx::createDynamicVertexBuffer(1 << 15, computeVertexDecl, BGFX_BUFFER_COMPUTE_READ_WRITE);
+ m_currPositionBuffer1 = bgfx::createDynamicVertexBuffer(1 << 15, computeVertexDecl, BGFX_BUFFER_COMPUTE_READ_WRITE);
+ m_prevPositionBuffer0 = bgfx::createDynamicVertexBuffer(1 << 15, computeVertexDecl, BGFX_BUFFER_COMPUTE_READ_WRITE);
+ m_prevPositionBuffer1 = bgfx::createDynamicVertexBuffer(1 << 15, computeVertexDecl, BGFX_BUFFER_COMPUTE_READ_WRITE);
- 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);
+ u_params = bgfx::createUniform("u_params", bgfx::UniformType::Vec4, 3);
- bgfx::UniformHandle u_params = bgfx::createUniform("u_params", bgfx::UniformType::Vec4, 3);
+ m_initInstancesProgram = bgfx::createProgram(loadShader("cs_init_instances"), true);
+ m_updateInstancesProgram = bgfx::createProgram(loadShader("cs_update_instances"), true);
- bgfx::ProgramHandle initInstancesProgram = bgfx::createProgram(loadShader("cs_init_instances"), true);
- bgfx::ProgramHandle updateInstancesProgram = bgfx::createProgram(loadShader("cs_update_instances"), true);
+ m_indirectProgram = BGFX_INVALID_HANDLE;
+ m_indirectBuffer = BGFX_INVALID_HANDLE;
- bgfx::ProgramHandle indirectProgram = BGFX_INVALID_HANDLE;
- bgfx::IndirectBufferHandle indirectBuffer = BGFX_INVALID_HANDLE;
+ if (m_indirectSupported)
+ {
+ m_indirectProgram = bgfx::createProgram(loadShader("cs_indirect"), true);
+ m_indirectBuffer = bgfx::createIndirectBuffer(2);
+ }
- if (indirectSupported)
- {
- indirectProgram = bgfx::createProgram(loadShader("cs_indirect"), true);
- indirectBuffer = bgfx::createIndirectBuffer(2);
- }
+ initializeParams(0, &m_paramsData);
- u_paramsDataStruct u_paramsData;
- InitializeParams(0, &u_paramsData);
+ bgfx::setUniform(u_params, &m_paramsData, 3);
+ bgfx::setBuffer(0, m_prevPositionBuffer0, bgfx::Access::Write);
+ bgfx::setBuffer(1, m_currPositionBuffer0, bgfx::Access::Write);
+ bgfx::dispatch(0, m_initInstancesProgram, kMaxParticleCount / kThreadGroupUpdateSize, 1, 1);
- 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 initialPos[3] = { 0.0f, 0.0f, -45.0f };
+ cameraCreate();
+ cameraSetPosition(initialPos);
+ cameraSetVerticalAngle(0.0f);
- float view[16];
- float initialPos[3] = { 0.0f, 0.0f, -45.0f };
- cameraCreate();
- cameraSetPosition(initialPos);
- cameraSetVerticalAngle(0.0f);
- cameraGetViewMtx(view);
+ m_useIndirect = false;
- int32_t scrollArea = 0;
+ m_timeOffset = bx::getHPCounter();
+ }
+ }
- bool useIndirect = false;
+ virtual int shutdown() override
+ {
+ // Cleanup.
+ cameraDestroy();
+ imguiDestroy();
- entry::MouseState mouseState;
- while (!entry::processEvents(width, height, debug, reset, &mouseState) )
+ if (m_computeSupported)
{
- 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, uint16_t(width), uint16_t(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_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
- , mouseState.m_mz
- , uint16_t(width)
- , uint16_t(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) )
+ if (m_indirectSupported)
{
- useIndirect = !useIndirect;
+ bgfx::destroy(m_indirectProgram);
+ bgfx::destroy(m_indirectBuffer);
}
- imguiEndScrollArea();
- imguiEndFrame();
- // Modify parameters and reset if shape is changed
- if (shape != u_paramsData.initialShape)
- {
- defaults = true;
- InitializeParams(shape, &u_paramsData);
- }
+ bgfx::destroy(u_params);
+ bgfx::destroy(m_currPositionBuffer0);
+ bgfx::destroy(m_currPositionBuffer1);
+ bgfx::destroy(m_prevPositionBuffer0);
+ bgfx::destroy(m_prevPositionBuffer1);
+ bgfx::destroy(m_updateInstancesProgram);
+ bgfx::destroy(m_initInstancesProgram);
+ bgfx::destroy(m_ibh);
+ bgfx::destroy(m_vbh);
+ bgfx::destroy(m_particleProgram);
+ }
- 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);
- }
+ // Shutdown bgfx.
+ bgfx::shutdown();
- if (useIndirect)
- {
- bgfx::setUniform(u_params, &u_paramsData, 3);
- bgfx::setBuffer(0, indirectBuffer, bgfx::Access::Write);
- bgfx::dispatch(0, indirectProgram);
- }
+ return 0;
+ }
- 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);
+ bool update() override
+ {
+ if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
+ {
+ imguiBeginFrame(
+ m_mouseState.m_mx
+ , m_mouseState.m_my
+ , (m_mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
+ | (m_mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
+ | (m_mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
+ , m_mouseState.m_mz
+ , uint16_t(m_width)
+ , uint16_t(m_height)
+ );
- if (useIndirect)
- {
- bgfx::dispatch(0, updateInstancesProgram, indirectBuffer, 1);
- }
- else
- {
- bgfx::dispatch(0, updateInstancesProgram, uint16_t(u_paramsData.dispatchSize), 1, 1);
- }
+ showExampleDialog(this
+ , !m_computeSupported
+ ? "Compute is not supported."
+ : NULL
+ );
- bx::xchg(currPositionBuffer0, currPositionBuffer1);
- bx::xchg(prevPositionBuffer0, prevPositionBuffer1);
+ 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);
- // Update camera.
- cameraUpdate(deltaTime, mouseState);
- cameraGetViewMtx(view);
+ // Set view 0 default viewport.
+ bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) );
- // 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);
- bgfx::setViewTransform(0, tmp, hmd->eye[0].projection, BGFX_VIEW_STEREO, hmd->eye[1].projection);
-
- // 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
+ if (m_computeSupported)
{
- float proj[16];
- bx::mtxProj(proj, 90.0f, float(width)/float(height), 0.1f, 10000.0f, bgfx::getCaps()->homogeneousDepth);
- bgfx::setViewTransform(0, view, proj);
-
- // Set view 0 default viewport.
- bgfx::setViewRect(0, 0, 0, uint16_t(width), uint16_t(height) );
- }
+ ImGui::SetNextWindowPos(
+ ImVec2(m_width - m_width / 5.0f - 10.0f, 10.0f)
+ , ImGuiSetCond_FirstUseEver
+ );
+ ImGui::Begin("Settings"
+ , NULL
+ , ImVec2(m_width / 5.0f, m_height / 1.5f)
+ , ImGuiWindowFlags_AlwaysAutoResize
+ );
- // Set vertex and index buffer.
- bgfx::setVertexBuffer(vbh);
- bgfx::setIndexBuffer(ibh);
- bgfx::setInstanceDataBuffer(currPositionBuffer0, 0, u_paramsData.dispatchSize * threadGroupUpdateSize);
+ bool reset = false;
+ int32_t shape = m_paramsData.initialShape;
+ if (ImGui::Combo("Initial shape", &shape, s_shapeNames, BX_COUNTOF(s_shapeNames) ) )
+ {
+ // Modify parameters and reset if shape is changed
+ initializeParams(shape, &m_paramsData);
+ reset = true;
+ }
+
+ ImGui::SliderInt("Random seed", &m_paramsData.baseSeed, 0, 100);
+
+ if (ImGui::Button("Reset") )
+ {
+ reset = true;
+ }
+
+ ImGui::Separator();
+
+ ImGui::SliderInt("Particle count (x512)", &m_paramsData.dispatchSize, 1, 64);
+ ImGui::SliderFloat("Gravity", &m_paramsData.gravity, 0.0f, 0.3f);
+ ImGui::SliderFloat("Damping", &m_paramsData.damping, 0.0f, 1.0f);
+ ImGui::SliderFloat("Max acceleration", &m_paramsData.maxAccel, 0.0f, 100.0f);
+ ImGui::SliderFloat("Time step", &m_paramsData.timeStep, 0.0f, 0.02f);
+
+ ImGui::Separator();
+
+ ImGui::SliderFloat("Particle intensity", &m_paramsData.particleIntensity, 0.0f, 1.0f);
+ ImGui::SliderFloat("Particle size", &m_paramsData.particleSize, 0.0f, 1.0f);
+ ImGui::SliderFloat("Particle power", &m_paramsData.particlePower, 0.001f, 16.0f);
+
+ ImGui::Separator();
+
+ if (m_indirectSupported)
+ {
+ ImGui::Checkbox("Use draw/dispatch indirect", &m_useIndirect);
+ }
+
+ ImGui::End();
+
+ if (reset)
+ {
+ bgfx::setBuffer(0, m_prevPositionBuffer0, bgfx::Access::Write);
+ bgfx::setBuffer(1, m_currPositionBuffer0, bgfx::Access::Write);
+ bgfx::setUniform(u_params, &m_paramsData, 3);
+ bgfx::dispatch(0, m_initInstancesProgram, kMaxParticleCount / kThreadGroupUpdateSize, 1, 1);
+ }
+
+ if (m_useIndirect)
+ {
+ bgfx::setUniform(u_params, &m_paramsData, 3);
+ bgfx::setBuffer(0, m_indirectBuffer, bgfx::Access::Write);
+ bgfx::dispatch(0, m_indirectProgram);
+ }
+
+ bgfx::setBuffer(0, m_prevPositionBuffer0, bgfx::Access::Read);
+ bgfx::setBuffer(1, m_currPositionBuffer0, bgfx::Access::Read);
+ bgfx::setBuffer(2, m_prevPositionBuffer1, bgfx::Access::Write);
+ bgfx::setBuffer(3, m_currPositionBuffer1, bgfx::Access::Write);
+ bgfx::setUniform(u_params, &m_paramsData, 3);
+
+ if (m_useIndirect)
+ {
+ bgfx::dispatch(0, m_updateInstancesProgram, m_indirectBuffer, 1);
+ }
+ else
+ {
+ bgfx::dispatch(0, m_updateInstancesProgram, uint16_t(m_paramsData.dispatchSize), 1, 1);
+ }
+
+ bx::xchg(m_currPositionBuffer0, m_currPositionBuffer1);
+ bx::xchg(m_prevPositionBuffer0, m_prevPositionBuffer1);
+
+ // Update camera.
+ cameraUpdate(deltaTime, m_mouseState);
+
+ float view[16];
+ 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);
+ bgfx::setViewTransform(
+ 0
+ , tmp
+ , hmd->eye[0].projection
+ , BGFX_VIEW_STEREO
+ , hmd->eye[1].projection
+ );
+
+ // 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(m_width)/float(m_height)
+ , 0.1f
+ , 10000.0f
+ , bgfx::getCaps()->homogeneousDepth
+ );
+ bgfx::setViewTransform(0, view, proj);
+
+ // Set view 0 default viewport.
+ bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) );
+ }
+
+ // Set vertex and index buffer.
+ bgfx::setVertexBuffer(0, m_vbh);
+ bgfx::setIndexBuffer(m_ibh);
+ bgfx::setInstanceDataBuffer(m_currPositionBuffer0
+ , 0
+ , m_paramsData.dispatchSize * kThreadGroupUpdateSize
+ );
- // Set render states.
- bgfx::setState(0
+ // 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);
+ // Submit primitive for rendering to view 0.
+ if (m_useIndirect)
+ {
+ bgfx::submit(0, m_particleProgram, m_indirectBuffer, 0);
+ }
+ else
+ {
+ bgfx::submit(0, m_particleProgram);
+ }
}
+ imguiEndFrame();
+
// 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);
+ return true;
}
-
- 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);
+ return false;
}
- 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, uint16_t(width), uint16_t(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();
- }
- }
+ entry::MouseState m_mouseState;
+
+ uint32_t m_width;
+ uint32_t m_height;
+ uint32_t m_debug;
+ uint32_t m_reset;
+ bool m_useIndirect;
+ bool m_computeSupported;
+ bool m_indirectSupported;
+
+ ParamsData m_paramsData;
+
+ bgfx::VertexBufferHandle m_vbh;
+ bgfx::IndexBufferHandle m_ibh;
+ bgfx::ProgramHandle m_particleProgram;
+ bgfx::ProgramHandle m_indirectProgram;
+ bgfx::ProgramHandle m_initInstancesProgram;
+ bgfx::ProgramHandle m_updateInstancesProgram;
+ bgfx::IndirectBufferHandle m_indirectBuffer;
+ bgfx::DynamicVertexBufferHandle m_currPositionBuffer0;
+ bgfx::DynamicVertexBufferHandle m_currPositionBuffer1;
+ bgfx::DynamicVertexBufferHandle m_prevPositionBuffer0;
+ bgfx::DynamicVertexBufferHandle m_prevPositionBuffer1;
+ bgfx::UniformHandle u_params;
+
+ int64_t m_timeOffset;
+};
- // Shutdown bgfx.
- bgfx::shutdown();
+} // namespace
- return 0;
-}
+ENTRY_IMPLEMENT_MAIN(ExampleNbody, "24-nbody", "N-body simulation with compute shaders using buffers.");