bgfx/examples/32-particles/particles.cpp

464 lines
9.6 KiB
C++
Raw Normal View History

2017-01-03 11:23:18 +03:00
/*
2024-01-14 12:56:36 +03:00
* Copyright 2011-2024 Branimir Karadzic. All rights reserved.
2022-01-15 22:59:06 +03:00
* License: https://github.com/bkaradzic/bgfx/blob/master/LICENSE
2017-01-03 11:23:18 +03:00
*/
#include "common.h"
#include "bgfx_utils.h"
#include <entry/cmd.h>
#include <entry/input.h>
#include <camera.h>
#include <debugdraw/debugdraw.h>
#include <imgui/imgui.h>
#include <bx/rng.h>
#include <bx/easing.h>
#include <ps/particle_system.h>
2017-06-26 07:44:04 +03:00
namespace
{
2017-01-03 11:23:18 +03:00
static const char* s_shapeNames[] =
{
"Sphere",
"Hemisphere",
"Circle",
"Disc",
"Rect",
};
static const char* s_directionName[] =
{
"Up",
"Outward",
};
static const char* s_easeFuncName[] =
{
"Linear",
2017-10-16 18:41:27 +03:00
"Step",
"SmoothStep",
2017-01-03 11:23:18 +03:00
"InQuad",
"OutQuad",
"InOutQuad",
"OutInQuad",
"InCubic",
"OutCubic",
"InOutCubic",
"OutInCubic",
"InQuart",
"OutQuart",
"InOutQuart",
"OutInQuart",
"InQuint",
"OutQuint",
"InOutQuint",
"OutInQuint",
"InSine",
"OutSine",
"InOutSine",
"OutInSine",
"InExpo",
"OutExpo",
"InOutExpo",
"OutInExpo",
"InCirc",
"OutCirc",
"InOutCirc",
"OutInCirc",
"InElastic",
"OutElastic",
"InOutElastic",
"OutInElastic",
"InBack",
"OutBack",
"InOutBack",
"OutInBack",
"InBounce",
"OutBounce",
"InOutBounce",
"OutInBounce",
};
BX_STATIC_ASSERT(BX_COUNTOF(s_easeFuncName) == bx::Easing::Count);
struct Emitter
{
EmitterUniforms m_uniforms;
EmitterHandle m_handle;
EmitterShape::Enum m_shape;
EmitterDirection::Enum m_direction;
void create()
{
m_shape = EmitterShape::Sphere;
m_direction = EmitterDirection::Outward;
m_handle = psCreateEmitter(m_shape, m_direction, 1024);
m_uniforms.reset();
}
void destroy()
{
psDestroyEmitter(m_handle);
}
void update()
{
psUpdateEmitter(m_handle, &m_uniforms);
}
2017-04-11 07:25:05 +03:00
void imgui()
2017-01-03 11:23:18 +03:00
{
// if (ImGui::CollapsingHeader("General") )
{
if (ImGui::Combo("Shape", (int*)&m_shape, s_shapeNames, BX_COUNTOF(s_shapeNames) )
2017-01-04 08:36:49 +03:00
|| ImGui::Combo("Direction", (int*)&m_direction, s_directionName, BX_COUNTOF(s_directionName) ) )
2017-01-03 11:23:18 +03:00
{
psDestroyEmitter(m_handle);
m_handle = psCreateEmitter(m_shape, m_direction, 1024);
}
ImGui::SliderInt("particles / s", (int*)&m_uniforms.m_particlesPerSecond, 0, 1024);
ImGui::SliderFloat("Gravity scale"
, &m_uniforms.m_gravityScale
, -2.0f
, 2.0f
);
ImGui::RangeSliderFloat("Life span"
, &m_uniforms.m_lifeSpan[0]
, &m_uniforms.m_lifeSpan[1]
, 0.1f
, 5.0f
);
if (ImGui::Button("Reset") )
{
psUpdateEmitter(m_handle);
}
}
if (ImGui::CollapsingHeader("Position and scale") )
{
ImGui::Combo("Position Ease", (int*)&m_uniforms.m_easePos, s_easeFuncName, BX_COUNTOF(s_easeFuncName) );
ImGui::RangeSliderFloat("Start offset"
, &m_uniforms.m_offsetStart[0]
, &m_uniforms.m_offsetStart[1]
, 0.0f
, 10.0f
);
ImGui::RangeSliderFloat("End offset"
, &m_uniforms.m_offsetEnd[0]
, &m_uniforms.m_offsetEnd[1]
, 0.0f
, 10.0f
);
ImGui::Text("Scale:");
ImGui::Combo("Scale Ease", (int*)&m_uniforms.m_easeScale, s_easeFuncName, BX_COUNTOF(s_easeFuncName) );
ImGui::RangeSliderFloat("Scale Start"
, &m_uniforms.m_scaleStart[0]
, &m_uniforms.m_scaleStart[1]
, 0.0f
, 3.0f
);
ImGui::RangeSliderFloat("Scale End"
, &m_uniforms.m_scaleEnd[0]
, &m_uniforms.m_scaleEnd[1]
, 0.0f
, 3.0f
);
}
if (ImGui::CollapsingHeader("Blending and color") )
{
ImGui::Combo("Blend Ease", (int*)&m_uniforms.m_easeBlend, s_easeFuncName, BX_COUNTOF(s_easeFuncName) );
ImGui::RangeSliderFloat("Blend Start"
, &m_uniforms.m_blendStart[0]
, &m_uniforms.m_blendStart[1]
, 0.0f
, 1.0f
);
ImGui::RangeSliderFloat("Blend End"
, &m_uniforms.m_blendEnd[0]
, &m_uniforms.m_blendEnd[1]
, 0.0f
, 1.0f
);
ImGui::Text("Color:");
ImGui::Combo("RGBA Ease", (int*)&m_uniforms.m_easeRgba, s_easeFuncName, BX_COUNTOF(s_easeFuncName) );
2017-06-24 02:01:17 +03:00
ImGui::ColorWheel("RGBA0", &m_uniforms.m_rgba[0], 0.3f);
ImGui::ColorWheel("RGBA1", &m_uniforms.m_rgba[1], 0.3f);
ImGui::ColorWheel("RGBA2", &m_uniforms.m_rgba[2], 0.3f);
ImGui::ColorWheel("RGBA3", &m_uniforms.m_rgba[3], 0.3f);
ImGui::ColorWheel("RGBA4", &m_uniforms.m_rgba[4], 0.3f);
2017-01-03 11:23:18 +03:00
}
2017-04-11 07:25:05 +03:00
}
2017-01-03 11:23:18 +03:00
2017-04-11 07:25:05 +03:00
void gizmo(const float* _view, const float* _proj)
{
2017-01-03 11:23:18 +03:00
float mtx[16];
float scale[3] = { 1.0f, 1.0f, 1.0f };
ImGuizmo::RecomposeMatrixFromComponents(m_uniforms.m_position, m_uniforms.m_angle, scale, mtx);
2017-01-03 11:23:18 +03:00
2017-04-11 07:25:05 +03:00
ImGuiIO& io = ImGui::GetIO();
ImGuizmo::SetRect(0, 0, io.DisplaySize.x, io.DisplaySize.y);
2017-01-03 11:23:18 +03:00
ImGuizmo::Manipulate(
_view
, _proj
2017-02-19 08:31:13 +03:00
, ImGuizmo::TRANSLATE
, ImGuizmo::LOCAL
2017-01-03 11:23:18 +03:00
, mtx
);
ImGuizmo::DecomposeMatrixToComponents(mtx, m_uniforms.m_position, m_uniforms.m_angle, scale);
}
};
2017-06-26 07:44:04 +03:00
class ExampleParticles : public entry::AppI
2017-01-03 11:23:18 +03:00
{
2017-06-26 07:44:04 +03:00
public:
2019-08-18 00:40:38 +03:00
ExampleParticles(const char* _name, const char* _description, const char* _url)
: entry::AppI(_name, _description, _url)
2017-06-26 07:44:04 +03:00
{
}
2017-07-15 10:17:29 +03:00
void init(int32_t _argc, const char* const* _argv, uint32_t _width, uint32_t _height) override
2017-01-03 11:23:18 +03:00
{
Args args(_argc, _argv);
2017-06-30 08:23:18 +03:00
m_width = _width;
m_height = _height;
2017-06-26 07:44:04 +03:00
m_debug = BGFX_DEBUG_NONE;
2017-01-03 11:23:18 +03:00
m_reset = BGFX_RESET_VSYNC;
bgfx::Init init;
init.type = args.m_type;
init.vendorId = args.m_pciId;
init.platformData.nwh = entry::getNativeWindowHandle(entry::kDefaultWindowHandle);
init.platformData.ndt = entry::getNativeDisplayHandle();
2023-11-04 07:36:00 +03:00
init.platformData.type = entry::getNativeWindowHandleType();
init.resolution.width = m_width;
init.resolution.height = m_height;
init.resolution.reset = m_reset;
bgfx::init(init);
2017-01-03 11:23:18 +03:00
// Enable m_debug text.
bgfx::setDebug(m_debug);
// Set view 0 clear state.
bgfx::setViewClear(0
, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
, 0x202020ff
, 1.0f
, 0
);
ddInit();
psInit();
2017-04-04 08:42:27 +03:00
bimg::ImageContainer* image = imageLoad(
"textures/particle.ktx"
, bgfx::TextureFormat::BGRA8
);
EmitterSpriteHandle sprite = psCreateSprite(
uint16_t(image->m_width)
, uint16_t(image->m_height)
, image->m_data
);
2017-04-04 08:42:27 +03:00
bimg::imageFree(image);
2017-01-03 11:23:18 +03:00
for (uint32_t ii = 0; ii < BX_COUNTOF(m_emitter); ++ii)
{
m_emitter[ii].create();
m_emitter[ii].m_uniforms.m_handle = sprite;
2017-10-17 19:16:07 +03:00
m_emitter[ii].update();
2017-01-03 11:23:18 +03:00
}
imguiCreate();
cameraCreate();
2018-12-22 08:05:26 +03:00
cameraSetPosition({ 0.0f, 2.0f, -12.0f });
2017-01-03 11:23:18 +03:00
cameraSetVerticalAngle(0.0f);
m_timeOffset = bx::getHPCounter();
}
2017-07-15 10:17:29 +03:00
virtual int shutdown() override
2017-01-03 11:23:18 +03:00
{
for (uint32_t ii = 0; ii < BX_COUNTOF(m_emitter); ++ii)
{
m_emitter[ii].destroy();
}
psShutdown();
ddShutdown();
imguiDestroy();
cameraDestroy();
// Shutdown bgfx.
bgfx::shutdown();
return 0;
}
2017-07-15 10:17:29 +03:00
bool update() override
2017-01-03 11:23:18 +03:00
{
if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
{
// Set view 0 default viewport.
2017-03-13 04:25:23 +03:00
bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) );
2017-01-03 11:23:18 +03:00
bgfx::touch(0);
int64_t now = bx::getHPCounter() - m_timeOffset;
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);
cameraUpdate(deltaTime, m_mouseState, ImGui::MouseOverArea() );
2017-01-03 11:23:18 +03:00
float view[16];
cameraGetViewMtx(view);
float proj[16];
// Set view and projection matrix for view 0.
{
2017-02-23 09:26:39 +03:00
bx::mtxProj(proj, 60.0f, float(m_width)/float(m_height), 0.1f, 100.0f, bgfx::getCaps()->homogeneousDepth);
2017-01-03 11:23:18 +03:00
bgfx::setViewTransform(0, view, proj);
2017-03-13 04:25:23 +03:00
bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) );
2017-01-03 11:23:18 +03:00
}
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
2017-03-13 04:25:23 +03:00
, uint16_t(m_width)
, uint16_t(m_height)
2017-01-03 11:23:18 +03:00
);
2017-06-30 09:19:20 +03:00
showExampleDialog(this);
2017-06-26 07:44:04 +03:00
2017-06-27 08:21:20 +03:00
ImGui::SetNextWindowPos(
ImVec2(m_width - m_width / 4.0f - 10.0f, 10.0f)
2017-12-02 08:04:27 +03:00
, ImGuiCond_FirstUseEver
);
ImGui::SetNextWindowSize(
ImVec2(m_width / 4.0f, m_height - 20.0f)
, ImGuiCond_FirstUseEver
2017-06-27 08:21:20 +03:00
);
2017-06-27 08:51:56 +03:00
ImGui::Begin("Settings"
2017-01-03 11:23:18 +03:00
, NULL
);
static float timeScale = 1.0f;
ImGui::SliderFloat("Time scale"
, &timeScale
, 0.0f
, 1.0f
);
static bool showBounds;
ImGui::Checkbox("Show bounds", &showBounds);
ImGui::Text("Emitter:");
static int currentEmitter = 0;
for (uint32_t ii = 0; ii < BX_COUNTOF(m_emitter); ++ii)
{
ImGui::SameLine();
char name[16];
bx::snprintf(name, BX_COUNTOF(name), "%d", ii);
ImGui::RadioButton(name, &currentEmitter, ii);
}
2017-04-11 07:25:05 +03:00
m_emitter[currentEmitter].imgui();
ImGui::End();
m_emitter[currentEmitter].gizmo(view, proj);
2017-01-03 11:23:18 +03:00
imguiEndFrame();
2018-09-19 03:24:18 +03:00
DebugDrawEncoder dde;
dde.begin(0);
2017-01-03 11:23:18 +03:00
2018-12-22 07:39:31 +03:00
dde.drawGrid(Axis::Y, { 0.0f, 0.0f, 0.0f });
2017-01-03 11:23:18 +03:00
2018-12-22 08:05:26 +03:00
const bx::Vec3 eye = cameraGetPosition();
2017-01-03 11:23:18 +03:00
m_emitter[currentEmitter].update();
psUpdate(deltaTime * timeScale);
2018-12-22 08:05:26 +03:00
psRender(0, view, eye);
2017-01-03 11:23:18 +03:00
if (showBounds)
{
2021-10-16 20:22:47 +03:00
bx::Aabb aabb;
psGetAabb(m_emitter[currentEmitter].m_handle, aabb);
2018-09-19 03:24:18 +03:00
dde.push();
dde.setWireframe(true);
dde.setColor(0xff0000ff);
dde.draw(aabb);
dde.pop();
2017-01-03 11:23:18 +03:00
}
2018-09-19 03:24:18 +03:00
dde.end();
2017-01-03 11:23:18 +03:00
// Advance to next frame. Rendering thread will be kicked to
// process submitted rendering primitives.
bgfx::frame();
2017-06-30 09:19:20 +03:00
return true;
2017-01-03 11:23:18 +03:00
}
return false;
}
entry::MouseState m_mouseState;
int64_t m_timeOffset;
uint32_t m_width;
uint32_t m_height;
uint32_t m_debug;
uint32_t m_reset;
Emitter m_emitter[4];
};
2017-06-26 07:44:04 +03:00
} // namespace
2019-08-17 23:25:39 +03:00
ENTRY_IMPLEMENT_MAIN(
2019-08-18 00:40:38 +03:00
ExampleParticles
, "32-particles"
, "Particles."
, "https://bkaradzic.github.io/bgfx/examples.html#particles"
);