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nbody-24: Switched to ImGui.

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This commit is contained in:
Branimir Karadžić
2017-06-17 21:01:05 -07:00
parent e7acaa2162
commit 32998296ae
1 changed files with 65 additions and 37 deletions
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102
examples/24-nbody/nbody.cpp
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@@ -9,6 +9,14 @@
#include "camera.h"
#include <bgfx/bgfx.h>
static const char* s_shapeNames[] =
{
"Point",
"Sphere",
"Box",
"Donut"
};
struct ParamsData
{
float timeStep;
@@ -228,8 +236,7 @@ class ExampleNbody : public entry::AppI
bool update() BX_OVERRIDE
{
entry::MouseState mouseState;
if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &mouseState) )
if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
{
const bgfx::Caps* caps = bgfx::getCaps();
const bool computeSupported = !!(caps->supported & BGFX_CAPS_COMPUTE);
@@ -253,47 +260,66 @@ class ExampleNbody : public entry::AppI
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
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)
);
static int32_t scrollArea = 0;
imguiBeginScrollArea("Settings", m_width - m_width / 4 - 10, 10, m_width / 4, 500, &scrollArea);
imguiSlider("Random seed", m_paramsData.baseSeed, 0, 100);
int32_t shape = imguiChoose(m_paramsData.initialShape, "Point", "Sphere", "Box", "Donut");
imguiSlider("Initial speed", m_paramsData.initialSpeed, 0.0f, 300.0f, 0.1f);
bool defaults = imguiButton("Reset");
imguiSeparatorLine();
imguiSlider("Particle count (x512)", m_paramsData.dispatchSize, 1, 64);
imguiSlider("Gravity", m_paramsData.gravity, 0.0f, 0.3f, 0.001f);
imguiSlider("Damping", m_paramsData.damping, 0.0f, 1.0f, 0.01f);
imguiSlider("Max acceleration", m_paramsData.maxAccel, 0.0f, 100.0f, 0.01f);
imguiSlider("Time step", m_paramsData.timeStep, 0.0f, 0.02f, 0.0001f);
imguiSeparatorLine();
imguiSlider("Particle intensity", m_paramsData.particleIntensity, 0.0f, 1.0f, 0.001f);
imguiSlider("Particle size", m_paramsData.particleSize, 0.0f, 1.0f, 0.001f);
imguiSlider("Particle power", m_paramsData.particlePower, 0.001f, 16.0f, 0.01f);
imguiSeparatorLine();
if (imguiCheck("Use draw/dispatch indirect", m_useIndirect, indirectSupported) )
ImGui::SetNextWindowPos(ImVec2(m_width - m_width / 5.0f - 10.0f, 10.0f) );
ImGui::Begin("N-body Settings"
, NULL
, ImVec2(m_width / 5.0f, m_height / 1.5f)
, ImGuiWindowFlags_AlwaysAutoResize
);
bool reset = false;
int32_t shape = m_paramsData.initialShape;
if (ImGui::Combo("Initial shape", &shape, s_shapeNames, BX_COUNTOF(s_shapeNames) ) )
{
m_useIndirect = !m_useIndirect;
// Modify parameters and reset if shape is changed
initializeParams(shape, &m_paramsData);
reset = true;
}
imguiEndScrollArea();
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 (indirectSupported)
{
ImGui::Checkbox("Use draw/dispatch indirect", &m_useIndirect);
}
ImGui::End();
imguiEndFrame();
// Modify parameters and reset if shape is changed
if (shape != m_paramsData.initialShape)
{
defaults = true;
initializeParams(shape, &m_paramsData);
}
if (defaults)
if (reset)
{
bgfx::setBuffer(0, m_prevPositionBuffer0, bgfx::Access::Write);
bgfx::setBuffer(1, m_currPositionBuffer0, bgfx::Access::Write);
@@ -327,7 +353,7 @@ class ExampleNbody : public entry::AppI
bx::xchg(m_prevPositionBuffer0, m_prevPositionBuffer1);
// Update camera.
cameraUpdate(deltaTime, mouseState);
cameraUpdate(deltaTime, m_mouseState);
float view[16];
cameraGetViewMtx(view);
@@ -443,6 +469,8 @@ class ExampleNbody : public entry::AppI
bgfx::DynamicVertexBufferHandle m_prevPositionBuffer1;
bgfx::UniformHandle u_params;
entry::MouseState m_mouseState;
int64_t m_timeOffset;
};