mirror of https://github.com/bkaradzic/bgfx
464 lines
9.6 KiB
C++
464 lines
9.6 KiB
C++
/*
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* Copyright 2011-2024 Branimir Karadzic. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx/blob/master/LICENSE
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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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namespace
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{
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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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"Step",
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"SmoothStep",
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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()
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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::ColorWheel("RGBA0", &m_uniforms.m_rgba[0], 0.3f);
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ImGui::ColorWheel("RGBA1", &m_uniforms.m_rgba[1], 0.3f);
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ImGui::ColorWheel("RGBA2", &m_uniforms.m_rgba[2], 0.3f);
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ImGui::ColorWheel("RGBA3", &m_uniforms.m_rgba[3], 0.3f);
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ImGui::ColorWheel("RGBA4", &m_uniforms.m_rgba[4], 0.3f);
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}
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}
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void gizmo(const float* _view, const float* _proj)
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{
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float mtx[16];
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float scale[3] = { 1.0f, 1.0f, 1.0f };
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ImGuizmo::RecomposeMatrixFromComponents(m_uniforms.m_position, m_uniforms.m_angle, scale, mtx);
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ImGuiIO& io = ImGui::GetIO();
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ImGuizmo::SetRect(0, 0, io.DisplaySize.x, io.DisplaySize.y);
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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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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 ExampleParticles : public entry::AppI
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{
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public:
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ExampleParticles(const char* _name, const char* _description, const char* _url)
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: entry::AppI(_name, _description, _url)
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{
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}
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void init(int32_t _argc, const char* const* _argv, uint32_t _width, uint32_t _height) override
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{
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Args args(_argc, _argv);
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m_width = _width;
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m_height = _height;
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m_debug = BGFX_DEBUG_NONE;
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m_reset = BGFX_RESET_VSYNC;
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bgfx::Init init;
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init.type = args.m_type;
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init.vendorId = args.m_pciId;
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init.platformData.nwh = entry::getNativeWindowHandle(entry::kDefaultWindowHandle);
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init.platformData.ndt = entry::getNativeDisplayHandle();
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init.platformData.type = entry::getNativeWindowHandleType();
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init.resolution.width = m_width;
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init.resolution.height = m_height;
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init.resolution.reset = m_reset;
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bgfx::init(init);
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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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bimg::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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bimg::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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m_emitter[ii].update();
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}
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imguiCreate();
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cameraCreate();
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cameraSetPosition({ 0.0f, 2.0f, -12.0f });
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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() 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() 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 float deltaTime = float(frameTime/freq);
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cameraUpdate(deltaTime, m_mouseState, ImGui::MouseOverArea() );
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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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{
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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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showExampleDialog(this);
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ImGui::SetNextWindowPos(
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ImVec2(m_width - m_width / 4.0f - 10.0f, 10.0f)
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, ImGuiCond_FirstUseEver
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);
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ImGui::SetNextWindowSize(
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ImVec2(m_width / 4.0f, m_height - 20.0f)
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, ImGuiCond_FirstUseEver
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);
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ImGui::Begin("Settings"
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, NULL
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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();
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ImGui::End();
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m_emitter[currentEmitter].gizmo(view, proj);
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imguiEndFrame();
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DebugDrawEncoder dde;
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dde.begin(0);
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dde.drawGrid(Axis::Y, { 0.0f, 0.0f, 0.0f });
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const bx::Vec3 eye = cameraGetPosition();
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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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bx::Aabb aabb;
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psGetAabb(m_emitter[currentEmitter].m_handle, aabb);
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dde.push();
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dde.setWireframe(true);
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dde.setColor(0xff0000ff);
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dde.draw(aabb);
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dde.pop();
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}
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dde.end();
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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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} // namespace
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ENTRY_IMPLEMENT_MAIN(
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ExampleParticles
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, "32-particles"
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, "Particles."
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, "https://bkaradzic.github.io/bgfx/examples.html#particles"
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);
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