Implemented color decay and color tint range support for particles

Assets/Scenes/Scene2.shade

@@ -1,3 +1,4 @@
+- NavData: 0
 - EID: 0
   Name: Default
   IsActive: true
@@ -170,8 +171,11 @@
       Angular Ranges And Offset: {x: 6.19999981, y: 1.10000002, z: 0, w: 0.100000001}
       Rotation Speed: 0.0309999995
       Rotation Decay: 0.0199999996
-      Texture Asset ID: 63456868
+      Texture Asset ID: 0
       Custom Update Shader Asset ID: 0
-      Color Tint: {x: 1, y: 0, z: 0, w: 1}
+      Color Tint: {x: 0, y: 1, z: 0.56387639, w: 1}
+      Color Tint Range: {x: 0.5, y: 0.5, z: 0.5, w: 0}
+      Color Decay: {x: 0, y: 0, z: 0, w: 0}
+      Acceleration: {x: 0, y: 0, z: 0}
       IsActive: true
   Scripts: ~

Assets/Shaders/ParticleEmit_CS.glsl

@@ -14,6 +14,8 @@ struct EmitterParameters
   float rotationDecay;
   vec4 lifeAndSizeRange; // min life, max life, min size, max size
   vec4 colorTint;
+  vec4 colorTintRange;
+  vec4 colorDecay;
   float sizeDecay;
   uint textureIndex;
   float padding[2];
@@ -27,6 +29,7 @@ struct ParticleData
   vec4 acceleration;
   vec4 scaleAndDecay;
   vec4 colorTint;
+  vec4 colorDecay;
   float life;
   uint textureIndex;
 };
@@ -175,9 +178,18 @@ void main()
   particle.scaleAndDecay.y = particleSize;
   particle.scaleAndDecay.z = emitterParams.data.sizeDecay;
   particle.scaleAndDecay.w = emitterParams.data.sizeDecay;
+  particle.colorDecay = emitterParams.data.colorDecay;
   
+  float randRange = rand(seed) * 2.0f - 1.0f;
+
   // Set particle color tint
-  particle.colorTint = emitterParams.data.colorTint;
+  particle.colorTint = emitterParams.data.colorTint + vec4 (randRange * emitterParams.data.colorTintRange.x,
+                                                            randRange * emitterParams.data.colorTintRange.y,
+                                                            randRange * emitterParams.data.colorTintRange.z,
+                                                            randRange * emitterParams.data.colorTintRange.w);
+
+    // particle.colorTint = emitterParams.data.colorTint;
+
 
   // Set the texture for the particle
   particle.textureIndex = emitterParams.data.textureIndex;

Assets/Shaders/ParticleUpdateGrowThenShrink_CS.glsl

@@ -18,6 +18,7 @@ struct ParticleData
   vec4 acceleration;
   vec4 scaleAndDecay;
   vec4 colorTint;
+  vec4 colorDecay;
   float life;
   uint textureIndex;
 };

Assets/Shaders/ParticleUpdateRandomAcc_CS.glsl

@@ -17,6 +17,8 @@ struct ParticleData
   vec4 velocity;
   vec4 acceleration;
   vec4 scaleAndDecay;
+  vec4 colorTint;
+  vec4 colorDecay;
   float life;
   uint textureIndex;
 };

Assets/Shaders/ParticleUpdateRandomColor_CS.glsl

@@ -18,6 +18,7 @@ struct ParticleData
   vec4 acceleration;
   vec4 scaleAndDecay;
   vec4 colorTint;
+  vec4 colorDecay;
   float life;
   uint textureIndex;
 };

Assets/Shaders/ParticleUpdate_CS.glsl

@@ -18,6 +18,7 @@ struct ParticleData
   vec4 acceleration;
   vec4 scaleAndDecay;
   vec4 colorTint;
+  vec4 colorDecay;
   float life;
   uint textureIndex;
 };
@@ -126,6 +127,7 @@ void main()
     particle.orientationSpeedDecay.x += particle.orientationSpeedDecay.y;
     particle.scaleAndDecay.x *= particle.scaleAndDecay.z;
     particle.scaleAndDecay.y *= particle.scaleAndDecay.w;
+    particle.colorTint -= particle.colorDecay * genericDataBuffer.data.dt;
 
     if (particle.orientationSpeedDecay.y > 0.0f)
     {

Assets/Shaders/Particle_VS.glsl

@@ -15,7 +15,6 @@ struct GenericData
   uint viewportHeight;
 };
 
-
 struct ParticleData
 {
   vec4 position;
@@ -24,6 +23,7 @@ struct ParticleData
   vec4 acceleration;
   vec4 scaleAndDecay;
   vec4 colorTint;
+  vec4 colorDecay;
   float life;
   uint textureIndex;
 };

SHADE_Engine/src/Editor/EditorWindow/Inspector/SHEditorComponentView.hpp

@@ -903,6 +903,26 @@ namespace SHADE
           comp->SetColorTint(val);
         });
 
+      SHEditorWidgets::DragVec4("Color Decay", {"x", "y", "z", "w"},
+        [comp = component]()
+        {
+          return comp->GetColorDecay();
+        },
+        [comp = component](SHVec4 const& val)
+        {
+          comp->SetColorDecay(val);
+        });
+
+      SHEditorWidgets::DragVec4("Color Tint Range", { "x", "y", "z", "w" },
+        [comp = component]()
+        {
+          return comp->GetColorTintRange();
+        },
+        [comp = component](SHVec4 const& val)
+        {
+          comp->SetColorTintRange(val);
+        });
+
 
       SHEditorWidgets::DragInt("Texture Index",
         [comp = component]()

SHADE_Engine/src/Graphics/MiddleEnd/Particles/SHParticleEmitterComponent.cpp

@@ -156,11 +156,45 @@ namespace SHADE
     cpuEmitterData.colorTint.z = tint.z;
   }
 
+  void SHParticleEmitterComponent::SetColorDecayRGB(SHVec3 const& decay) noexcept
+  {
+    cpuEmitterData.colorDecay.x = decay.x;
+    cpuEmitterData.colorDecay.y = decay.y;
+    cpuEmitterData.colorDecay.z = decay.z;
+  }
+
+  void SHParticleEmitterComponent::SetColorDecayAlpha(float alpha) noexcept
+  {
+    cpuEmitterData.colorDecay.w = alpha;
+  }
+
   void SHParticleEmitterComponent::SetColorTintAlpha(float alpha) noexcept
   {
     cpuEmitterData.colorTint.w = alpha;
   }
 
+  void SHParticleEmitterComponent::SetColorTintRange(SHVec4 const& tintRange) noexcept
+  {
+    cpuEmitterData.colorTintRange = tintRange;
+  }
+
+  void SHParticleEmitterComponent::SetColorTintRangeRGB(SHVec3 const& tintRange) noexcept
+  {
+    cpuEmitterData.colorTintRange.x = tintRange.x;
+    cpuEmitterData.colorTintRange.y = tintRange.y;
+    cpuEmitterData.colorTintRange.z = tintRange.z;
+  }
+
+  void SHParticleEmitterComponent::SetColorTintRangeAlpha(float alpha) noexcept
+  {
+    cpuEmitterData.colorTintRange.w = alpha;
+  }
+
+  void SHParticleEmitterComponent::SetColorDecay(SHVec4 const& decay) noexcept
+  {
+    cpuEmitterData.colorDecay = decay;
+  }
+
   uint32_t SHParticleEmitterComponent::GetEmissionCount(void) const noexcept
   {
     return emissionCount;
@@ -273,9 +307,39 @@ namespace SHADE
     return SHVec3 (cpuEmitterData.colorTint.x, cpuEmitterData.colorTint.y, cpuEmitterData.colorTint.z);
   }
 
+  SHVec3 SHParticleEmitterComponent::GetColorDecayRGB(void) const noexcept
+  {
+    return SHVec3(cpuEmitterData.colorDecay.x, cpuEmitterData.colorDecay.y, cpuEmitterData.colorDecay.z);
+  }
+
+  float SHParticleEmitterComponent::GetColorDecayAlpha(void) const noexcept
+  {
+    return cpuEmitterData.colorDecay.w;
+  }
+
   float SHParticleEmitterComponent::GetColorTintAlpha(void) const noexcept
   {
     return cpuEmitterData.colorTint.w;
   }
 
+  SHVec4 const& SHParticleEmitterComponent::GetColorTintRange(void) const noexcept
+  {
+    return cpuEmitterData.colorTintRange;
+  }
+
+  SHVec3 SHParticleEmitterComponent::GetColorTintRangeRGB(void) const noexcept
+  {
+    return SHVec3(cpuEmitterData.colorTintRange.x, cpuEmitterData.colorTintRange.y, cpuEmitterData.colorTintRange.z);
+  }
+
+  float SHParticleEmitterComponent::GetColorTintRangeAlpha(void) const noexcept
+  {
+    return cpuEmitterData.colorTintRange.w;
+  }
+
+  SHVec4 const& SHParticleEmitterComponent::GetColorDecay(void) const noexcept
+  {
+    return cpuEmitterData.colorDecay;
+  }
+
 }

SHADE_Engine/src/Graphics/MiddleEnd/Particles/SHParticleEmitterComponent.h

@@ -46,6 +46,12 @@ namespace SHADE
       //! Color tint to assign to particles 
       SHVec4 colorTint;
 
+      //! Color tint range to assign to particles 
+      SHVec4 colorTintRange;
+
+      //! Color decay for particle
+      SHVec4 colorDecay;
+
       //! Size decay for particles
       float sizeDecayMult;
 
@@ -77,6 +83,9 @@ namespace SHADE
       //! Color tinting for particle
       SHVec4 colorTint;
 
+      //! Color tinting for particle
+      SHVec4 colorDecay;
+
       //! Life of the particle
       float life;
 
@@ -172,6 +181,13 @@ namespace SHADE
     void SetColorTint               (SHVec4 tint) noexcept;
     void SetColorTintRGB            (SHVec3 tint) noexcept;
     void SetColorTintAlpha          (float alpha) noexcept;
+    void SetColorTintRange          (SHVec4 const& tintRange) noexcept;
+    void SetColorTintRangeRGB       (SHVec3 const& tintRange) noexcept;
+    void SetColorTintRangeAlpha     (float alpha) noexcept;
+
+    void SetColorDecay              (SHVec4 const& decay) noexcept;
+    void SetColorDecayRGB           (SHVec3 const& decay) noexcept;
+    void SetColorDecayAlpha         (float alpha) noexcept;
 
     uint32_t GetEmissionCount                      (void) const noexcept;
     bool GetPassive                                (void) const noexcept;
@@ -194,6 +210,12 @@ namespace SHADE
     SHVec4 const& GetColorTint                     (void) const noexcept;
     SHVec3 GetColorTintRGB                         (void) const noexcept;
     float  GetColorTintAlpha                       (void) const noexcept;
+    SHVec4 const& GetColorTintRange                (void) const noexcept;
+    SHVec3 GetColorTintRangeRGB                    (void) const noexcept;
+    float  GetColorTintRangeAlpha                  (void) const noexcept;
+    SHVec4 const& GetColorDecay                    (void) const noexcept;
+    SHVec3 GetColorDecayRGB                        (void) const noexcept;
+    float  GetColorDecayAlpha                      (void) const noexcept;
     
     /*-----------------------------------------------------------------------*/
     /* NON-INTERFACE FUNCTIONS                                               */

SHADE_Engine/src/Serialization/SHYAMLConverters.h

@@ -520,6 +520,8 @@ namespace YAML
     static constexpr std::string_view TEXTURE_ASSET_ID_TAG = "Texture Asset ID";
     static constexpr std::string_view CUSTOM_UPDATE_SHADER_ASSET_ID_TAG = "Custom Update Shader Asset ID";
     static constexpr std::string_view COLOR_TINT_TAG = "Color Tint";
+    static constexpr std::string_view COLOR_TINT_RANGE_TAG = "Color Tint Range";
+    static constexpr std::string_view COLOR_DECAY_TAG = "Color Decay";
     static constexpr std::string_view ACCELERATION_TAG = "Acceleration";
 
     static YAML::Node encode(SHParticleEmitterComponent const& rhs)
@@ -541,6 +543,8 @@ namespace YAML
       node[TEXTURE_ASSET_ID_TAG.data()] = rhs.GetTextureAssetID();
       node[CUSTOM_UPDATE_SHADER_ASSET_ID_TAG.data()] = rhs.GetCustomUpdateShaderAssetID();
       node[COLOR_TINT_TAG.data()] = rhs.GetColorTint();
+      node[COLOR_TINT_RANGE_TAG.data()] = rhs.GetColorTintRange();
+      node[COLOR_DECAY_TAG.data()] = rhs.GetColorDecay();
       node[ACCELERATION_TAG.data()] = rhs.GetAcceleration();
 
       return node;
@@ -591,6 +595,12 @@ namespace YAML
       if (node[COLOR_TINT_TAG.data()].IsDefined())
         rhs.SetColorTint(node[COLOR_TINT_TAG.data()].as<SHVec4>());
 
+      if (node[COLOR_TINT_RANGE_TAG.data()].IsDefined())
+        rhs.SetColorTintRange(node[COLOR_TINT_RANGE_TAG.data()].as<SHVec4>());
+
+      if (node[COLOR_DECAY_TAG.data()].IsDefined())
+        rhs.SetColorDecay(node[COLOR_DECAY_TAG.data()].as<SHVec4>());
+
       if (node[ACCELERATION_TAG.data()].IsDefined())
         rhs.SetAcceleration(node[ACCELERATION_TAG.data()].as<SHVec3>());