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-rw-r--r--3rdparty/bgfx/examples/32-particles/particles.cpp426
1 files changed, 426 insertions, 0 deletions
diff --git a/3rdparty/bgfx/examples/32-particles/particles.cpp b/3rdparty/bgfx/examples/32-particles/particles.cpp
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+++ b/3rdparty/bgfx/examples/32-particles/particles.cpp
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+/*
+ * Copyright 2011-2017 Branimir Karadzic. All rights reserved.
+ * License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
+ */
+
+#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>
+
+static const char* s_shapeNames[] =
+{
+ "Sphere",
+ "Hemisphere",
+ "Circle",
+ "Disc",
+ "Rect",
+};
+
+static const char* s_directionName[] =
+{
+ "Up",
+ "Outward",
+};
+
+static const char* s_easeFuncName[] =
+{
+ "Linear",
+ "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);
+ }
+
+ void imgui(const float* _view, const float* _proj)
+ {
+// if (ImGui::CollapsingHeader("General") )
+ {
+ if (ImGui::Combo("Shape", (int*)&m_shape, s_shapeNames, BX_COUNTOF(s_shapeNames) )
+ || ImGui::Combo("Direction", (int*)&m_direction, s_directionName, BX_COUNTOF(s_directionName) ) )
+ {
+ 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) );
+ ImGui::ColorEdit4("RGBA0", &m_uniforms.m_rgba[0], true);
+ ImGui::ColorEdit4("RGBA1", &m_uniforms.m_rgba[1], true);
+ ImGui::ColorEdit4("RGBA2", &m_uniforms.m_rgba[2], true);
+ ImGui::ColorEdit4("RGBA3", &m_uniforms.m_rgba[3], true);
+ ImGui::ColorEdit4("RGBA4", &m_uniforms.m_rgba[4], true);
+ }
+
+ ImGui::End();
+
+ float mtx[16];
+ bx::mtxSRT(mtx
+ , 1.0f, 1.0f, 1.0f
+ , m_uniforms.m_angle[0], m_uniforms.m_angle[1], m_uniforms.m_angle[2]
+ , m_uniforms.m_position[0], m_uniforms.m_position[1], m_uniforms.m_position[2]
+ );
+
+ ImGuizmo::Manipulate(
+ _view
+ , _proj
+ , ImGuizmo::OPERATION::TRANSLATE
+ , ImGuizmo::MODE::LOCAL
+ , mtx
+ );
+
+ float scale[3];
+ ImGuizmo::DecomposeMatrixToComponents(mtx, m_uniforms.m_position, m_uniforms.m_angle, scale);
+ }
+};
+
+class Particles : public entry::AppI
+{
+ void init(int _argc, char** _argv) BX_OVERRIDE
+ {
+ Args args(_argc, _argv);
+
+ m_width = 1280;
+ m_height = 720;
+ m_debug = BGFX_DEBUG_TEXT;
+ m_reset = BGFX_RESET_VSYNC;
+
+ bgfx::init(args.m_type, args.m_pciId);
+ bgfx::reset(m_width, m_height, m_reset);
+
+ // 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();
+
+ for (uint32_t ii = 0; ii < BX_COUNTOF(m_emitter); ++ii)
+ {
+ m_emitter[ii].create();
+ }
+
+ imguiCreate();
+
+ cameraCreate();
+
+ const float initialPos[3] = { 0.0f, 2.0f, -12.0f };
+ cameraSetPosition(initialPos);
+ cameraSetVerticalAngle(0.0f);
+
+ m_timeOffset = bx::getHPCounter();
+ }
+
+ virtual int shutdown() BX_OVERRIDE
+ {
+ 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;
+ }
+
+ bool update() BX_OVERRIDE
+ {
+ if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
+ {
+ // Set view 0 default viewport.
+ bgfx::setViewRect(0, 0, 0, m_width, m_height);
+
+ 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 double toMs = 1000.0/freq;
+ const float deltaTime = float(frameTime/freq);
+
+ // Use debug font to print information about this example.
+ bgfx::dbgTextClear();
+ bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/32-particles");
+ bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Particles.");
+ bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
+
+ // Update camera.George RR Martin
+ cameraUpdate(deltaTime, m_mouseState);
+
+ float view[16];
+ cameraGetViewMtx(view);
+
+ float proj[16];
+
+ // Set view and projection matrix for view 0.
+ const bgfx::HMD* hmd = bgfx::getHMD();
+ if (NULL != hmd && 0 != (hmd->flags & BGFX_HMD_RENDERING) )
+ {
+ float eye[3];
+ cameraGetPosition(eye);
+ bx::mtxQuatTranslationHMD(view, hmd->eye[0].rotation, eye);
+ bgfx::setViewTransform(0, view, hmd->eye[0].projection, BGFX_VIEW_STEREO, hmd->eye[1].projection);
+ bgfx::setViewRect(0, 0, 0, hmd->width, hmd->height);
+ }
+ else
+ {
+ bx::mtxProj(proj, 60.0f, float(m_width)/float(m_height), 0.1f, 100.0f);
+
+ bgfx::setViewTransform(0, view, proj);
+ bgfx::setViewRect(0, 0, 0, m_width, m_height);
+ }
+
+ 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
+ , m_width
+ , m_height
+ );
+
+ ImGui::Begin("Properties"
+ , NULL
+ , ImVec2(400.0f, 600.0f)
+ , ImGuiWindowFlags_AlwaysAutoResize
+ );
+
+ 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);
+ }
+
+ m_emitter[currentEmitter].imgui(view, proj);
+
+ imguiEndFrame();
+
+ ddBegin(0);
+
+ float center[3] = { 0.0f, 0.0f, 0.0f };
+ ddDrawGrid(Axis::Y, center);
+
+ float eye[3];
+ cameraGetPosition(eye);
+
+ m_emitter[currentEmitter].update();
+
+ psUpdate(deltaTime * timeScale);
+ psRender(0, view, eye);
+
+ if (showBounds)
+ {
+ Aabb aabb;
+ psGetAabb(m_emitter[currentEmitter].m_handle, aabb);
+ ddSetColor(0xff0000ff);
+ ddDraw(aabb);
+ }
+
+ ddEnd();
+
+ // Advance to next frame. Rendering thread will be kicked to
+ // process submitted rendering primitives.
+ bgfx::frame();
+
+ return true;
+ }
+
+ 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];
+};
+
+ENTRY_IMPLEMENT_MAIN(Particles);