441 lines
9.3 KiB
C++
441 lines
9.3 KiB
C++
/*
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* Copyright 2011-2017 Branimir Karadzic. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
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*/
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#include "common.h"
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#include "bgfx_utils.h"
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#include <entry/cmd.h>
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#include <entry/input.h>
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#include <camera.h>
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#include <debugdraw/debugdraw.h>
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#include <imgui/imgui.h>
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#include <bx/rng.h>
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#include <bx/easing.h>
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#include <ps/particle_system.h>
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static const char* s_shapeNames[] =
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{
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"Sphere",
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"Hemisphere",
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"Circle",
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"Disc",
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"Rect",
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};
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static const char* s_directionName[] =
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{
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"Up",
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"Outward",
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};
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static const char* s_easeFuncName[] =
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{
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"Linear",
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"InQuad",
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"OutQuad",
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"InOutQuad",
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"OutInQuad",
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"InCubic",
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"OutCubic",
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"InOutCubic",
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"OutInCubic",
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"InQuart",
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"OutQuart",
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"InOutQuart",
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"OutInQuart",
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"InQuint",
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"OutQuint",
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"InOutQuint",
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"OutInQuint",
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"InSine",
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"OutSine",
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"InOutSine",
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"OutInSine",
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"InExpo",
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"OutExpo",
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"InOutExpo",
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"OutInExpo",
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"InCirc",
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"OutCirc",
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"InOutCirc",
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"OutInCirc",
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"InElastic",
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"OutElastic",
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"InOutElastic",
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"OutInElastic",
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"InBack",
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"OutBack",
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"InOutBack",
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"OutInBack",
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"InBounce",
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"OutBounce",
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"InOutBounce",
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"OutInBounce",
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};
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BX_STATIC_ASSERT(BX_COUNTOF(s_easeFuncName) == bx::Easing::Count);
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struct Emitter
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{
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EmitterUniforms m_uniforms;
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EmitterHandle m_handle;
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EmitterShape::Enum m_shape;
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EmitterDirection::Enum m_direction;
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void create()
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{
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m_shape = EmitterShape::Sphere;
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m_direction = EmitterDirection::Outward;
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m_handle = psCreateEmitter(m_shape, m_direction, 1024);
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m_uniforms.reset();
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}
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void destroy()
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{
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psDestroyEmitter(m_handle);
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}
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void update()
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{
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psUpdateEmitter(m_handle, &m_uniforms);
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}
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void imgui(const float* _view, const float* _proj)
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{
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// if (ImGui::CollapsingHeader("General") )
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{
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if (ImGui::Combo("Shape", (int*)&m_shape, s_shapeNames, BX_COUNTOF(s_shapeNames) )
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|| ImGui::Combo("Direction", (int*)&m_direction, s_directionName, BX_COUNTOF(s_directionName) ) )
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{
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psDestroyEmitter(m_handle);
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m_handle = psCreateEmitter(m_shape, m_direction, 1024);
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}
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ImGui::SliderInt("particles / s", (int*)&m_uniforms.m_particlesPerSecond, 0, 1024);
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ImGui::SliderFloat("Gravity scale"
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, &m_uniforms.m_gravityScale
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, -2.0f
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, 2.0f
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);
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ImGui::RangeSliderFloat("Life span"
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, &m_uniforms.m_lifeSpan[0]
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, &m_uniforms.m_lifeSpan[1]
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, 0.1f
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, 5.0f
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);
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if (ImGui::Button("Reset") )
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{
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psUpdateEmitter(m_handle);
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}
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}
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if (ImGui::CollapsingHeader("Position and scale") )
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{
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ImGui::Combo("Position Ease", (int*)&m_uniforms.m_easePos, s_easeFuncName, BX_COUNTOF(s_easeFuncName) );
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ImGui::RangeSliderFloat("Start offset"
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, &m_uniforms.m_offsetStart[0]
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, &m_uniforms.m_offsetStart[1]
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, 0.0f
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, 10.0f
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);
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ImGui::RangeSliderFloat("End offset"
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, &m_uniforms.m_offsetEnd[0]
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, &m_uniforms.m_offsetEnd[1]
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, 0.0f
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, 10.0f
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);
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ImGui::Text("Scale:");
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ImGui::Combo("Scale Ease", (int*)&m_uniforms.m_easeScale, s_easeFuncName, BX_COUNTOF(s_easeFuncName) );
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ImGui::RangeSliderFloat("Scale Start"
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, &m_uniforms.m_scaleStart[0]
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, &m_uniforms.m_scaleStart[1]
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, 0.0f
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, 3.0f
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);
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ImGui::RangeSliderFloat("Scale End"
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, &m_uniforms.m_scaleEnd[0]
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, &m_uniforms.m_scaleEnd[1]
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, 0.0f
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, 3.0f
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);
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}
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if (ImGui::CollapsingHeader("Blending and color") )
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{
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ImGui::Combo("Blend Ease", (int*)&m_uniforms.m_easeBlend, s_easeFuncName, BX_COUNTOF(s_easeFuncName) );
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ImGui::RangeSliderFloat("Blend Start"
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, &m_uniforms.m_blendStart[0]
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, &m_uniforms.m_blendStart[1]
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, 0.0f
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, 1.0f
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);
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ImGui::RangeSliderFloat("Blend End"
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, &m_uniforms.m_blendEnd[0]
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, &m_uniforms.m_blendEnd[1]
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, 0.0f
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, 1.0f
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);
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ImGui::Text("Color:");
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ImGui::Combo("RGBA Ease", (int*)&m_uniforms.m_easeRgba, s_easeFuncName, BX_COUNTOF(s_easeFuncName) );
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ImGui::ColorEdit4("RGBA0", &m_uniforms.m_rgba[0], true);
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ImGui::ColorEdit4("RGBA1", &m_uniforms.m_rgba[1], true);
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ImGui::ColorEdit4("RGBA2", &m_uniforms.m_rgba[2], true);
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ImGui::ColorEdit4("RGBA3", &m_uniforms.m_rgba[3], true);
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ImGui::ColorEdit4("RGBA4", &m_uniforms.m_rgba[4], true);
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}
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ImGui::End();
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float mtx[16];
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bx::mtxSRT(mtx
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, 1.0f, 1.0f, 1.0f
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, m_uniforms.m_angle[0], m_uniforms.m_angle[1], m_uniforms.m_angle[2]
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, m_uniforms.m_position[0], m_uniforms.m_position[1], m_uniforms.m_position[2]
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);
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ImGuizmo::Manipulate(
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_view
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, _proj
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, ImGuizmo::TRANSLATE
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, ImGuizmo::LOCAL
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, mtx
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);
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float scale[3];
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ImGuizmo::DecomposeMatrixToComponents(mtx, m_uniforms.m_position, m_uniforms.m_angle, scale);
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}
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};
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class Particles : public entry::AppI
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{
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void init(int _argc, char** _argv) BX_OVERRIDE
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{
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Args args(_argc, _argv);
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m_width = 1280;
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m_height = 720;
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m_debug = BGFX_DEBUG_TEXT;
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m_reset = BGFX_RESET_VSYNC;
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bgfx::init(args.m_type, args.m_pciId);
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bgfx::reset(m_width, m_height, m_reset);
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// Enable m_debug text.
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bgfx::setDebug(m_debug);
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// Set view 0 clear state.
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bgfx::setViewClear(0
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, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
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, 0x202020ff
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, 1.0f
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, 0
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);
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ddInit();
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psInit();
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bgfx::ImageContainer* image = imageLoad(
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"textures/particle.ktx"
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, bgfx::TextureFormat::BGRA8
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);
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EmitterSpriteHandle sprite = psCreateSprite(
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uint16_t(image->m_width)
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, uint16_t(image->m_height)
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, image->m_data
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);
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bgfx::imageFree(image);
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for (uint32_t ii = 0; ii < BX_COUNTOF(m_emitter); ++ii)
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{
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m_emitter[ii].create();
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m_emitter[ii].m_uniforms.m_handle = sprite;
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}
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imguiCreate();
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cameraCreate();
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const float initialPos[3] = { 0.0f, 2.0f, -12.0f };
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cameraSetPosition(initialPos);
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cameraSetVerticalAngle(0.0f);
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m_timeOffset = bx::getHPCounter();
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}
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virtual int shutdown() BX_OVERRIDE
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{
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for (uint32_t ii = 0; ii < BX_COUNTOF(m_emitter); ++ii)
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{
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m_emitter[ii].destroy();
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}
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psShutdown();
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ddShutdown();
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imguiDestroy();
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cameraDestroy();
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// Shutdown bgfx.
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bgfx::shutdown();
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return 0;
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}
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bool update() BX_OVERRIDE
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{
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if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
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{
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// Set view 0 default viewport.
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bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) );
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bgfx::touch(0);
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int64_t now = bx::getHPCounter() - m_timeOffset;
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static int64_t last = now;
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const int64_t frameTime = now - last;
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last = now;
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const double freq = double(bx::getHPFrequency() );
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const double toMs = 1000.0/freq;
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const float deltaTime = float(frameTime/freq);
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// Use debug font to print information about this example.
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bgfx::dbgTextClear();
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bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/32-particles");
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bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Particles.");
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bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
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// Update camera.George RR Martin
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cameraUpdate(deltaTime, m_mouseState);
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float view[16];
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cameraGetViewMtx(view);
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float proj[16];
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// Set view and projection matrix for view 0.
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const bgfx::HMD* hmd = bgfx::getHMD();
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if (NULL != hmd && 0 != (hmd->flags & BGFX_HMD_RENDERING) )
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{
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float eye[3];
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cameraGetPosition(eye);
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bx::mtxQuatTranslationHMD(view, hmd->eye[0].rotation, eye);
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bgfx::setViewTransform(0, view, hmd->eye[0].projection, BGFX_VIEW_STEREO, hmd->eye[1].projection);
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bgfx::setViewRect(0, 0, 0, hmd->width, hmd->height);
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}
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else
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{
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bx::mtxProj(proj, 60.0f, float(m_width)/float(m_height), 0.1f, 100.0f, bgfx::getCaps()->homogeneousDepth);
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bgfx::setViewTransform(0, view, proj);
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bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) );
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}
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imguiBeginFrame(
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m_mouseState.m_mx
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, m_mouseState.m_my
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, (m_mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
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| (m_mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
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| (m_mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
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, m_mouseState.m_mz
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, uint16_t(m_width)
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, uint16_t(m_height)
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);
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ImGui::Begin("Properties"
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, NULL
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, ImVec2(400.0f, 600.0f)
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, ImGuiWindowFlags_AlwaysAutoResize
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);
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static float timeScale = 1.0f;
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ImGui::SliderFloat("Time scale"
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, &timeScale
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, 0.0f
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, 1.0f
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);
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static bool showBounds;
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ImGui::Checkbox("Show bounds", &showBounds);
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ImGui::Text("Emitter:");
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static int currentEmitter = 0;
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for (uint32_t ii = 0; ii < BX_COUNTOF(m_emitter); ++ii)
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{
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ImGui::SameLine();
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char name[16];
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bx::snprintf(name, BX_COUNTOF(name), "%d", ii);
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ImGui::RadioButton(name, ¤tEmitter, ii);
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}
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m_emitter[currentEmitter].imgui(view, proj);
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imguiEndFrame();
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ddBegin(0);
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float center[3] = { 0.0f, 0.0f, 0.0f };
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ddDrawGrid(Axis::Y, center);
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float eye[3];
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cameraGetPosition(eye);
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m_emitter[currentEmitter].update();
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psUpdate(deltaTime * timeScale);
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psRender(0, view, eye);
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if (showBounds)
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{
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Aabb aabb;
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psGetAabb(m_emitter[currentEmitter].m_handle, aabb);
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ddSetColor(0xff0000ff);
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ddDraw(aabb);
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}
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ddEnd();
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// Advance to next frame. Rendering thread will be kicked to
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// process submitted rendering primitives.
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bgfx::frame();
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return true;
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}
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return false;
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}
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entry::MouseState m_mouseState;
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int64_t m_timeOffset;
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uint32_t m_width;
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uint32_t m_height;
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uint32_t m_debug;
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uint32_t m_reset;
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Emitter m_emitter[4];
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};
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ENTRY_IMPLEMENT_MAIN(Particles);
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