Fixed attenuation for lights.

src/Components/PointLight.h

@@ -13,10 +13,12 @@ struct PointLight : Component
 		: Specular(1.0f, 1.0f, 1.0f)
 		, Diffuse(0.4f, 0.4f, 0.4f)
 		, specularExponent(50.0f)
-		, Scale(10.0f)
+		, ConstantAttenuation(1.05f)
+		, LinearAttenuation(0.f)
+		, QuadraticAttenuation(2.55f)
 	{ }
 
-	float constantAttenuation, linearAttenuation, quadraticAttenuation;
+	float ConstantAttenuation, LinearAttenuation, QuadraticAttenuation;
 	Color color;
 
 	glm::vec3 Specular;

src/GameWorld.cpp

@@ -224,11 +224,11 @@ void GameWorld::Initialize()
  	CommitEntity(car);
  }
 */
-	for(int i = 0; i < 20; i++)
+	for(int i = 0; i < 50; i++)
 	{
 		auto Light = CreateEntity();
 		auto transform = AddComponent<Components::Transform>(Light, "Transform");
-		transform->Position = glm::vec3(i*cos(i), 3, 0 + i*sin(i));
+		transform->Position = glm::vec3(i*cos(i), (float)(0.1*i), 0 + i*sin(i));
 		auto light = AddComponent<Components::PointLight>(Light, "PointLight");
 		//light->Specular = glm::vec3(1.0f, 1.0f, 1.0f);
 		auto model = AddComponent<Components::Model>(Light, "Model");

src/Renderer.cpp

@@ -132,7 +132,7 @@ void Renderer::LoadContent()
 	m_FinalPassProgram.AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/FinalPass.frag.glsl")));
 	m_FinalPassProgram.Compile();
 	m_FinalPassProgram.Link();
-	Gamma = 1;
+	Gamma = 2.2f;
 	m_ScreenQuad = CreateQuad();
 
 	FrameBufferTextures();
@@ -215,10 +215,10 @@ void Renderer::DrawScene()
 // 	glUniform3fv(glGetUniformLocation(m_ShaderProgram.GetHandle(), "position"), Lights, Light_position.data());
 // 	glUniform3fv(glGetUniformLocation(m_ShaderProgram.GetHandle(), "specular"), Lights, Light_specular.data());
 // 	glUniform3fv(glGetUniformLocation(m_ShaderProgram.GetHandle(), "diffuse"), Lights, Light_diffuse.data());
-	glUniform1fv(glGetUniformLocation(m_ShaderProgram.GetHandle(), "constantAttenuation"), Lights.size(), Light_constantAttenuation.data());
-	glUniform1fv(glGetUniformLocation(m_ShaderProgram.GetHandle(), "linearAttenuation"), Lights.size(), Light_linearAttenuation.data());
-	glUniform1fv(glGetUniformLocation(m_ShaderProgram.GetHandle(), "quadraticAttenuation"), Lights.size(), Light_quadraticAttenuation.data());
-	glUniform1fv(glGetUniformLocation(m_ShaderProgram.GetHandle(), "spotExponent"), Lights.size(), Light_spotExponent.data());
+// 	glUniform1fv(glGetUniformLocation(m_ShaderProgram.GetHandle(), "constantAttenuation"), Lights.size(), Light_constantAttenuation.data());
+// 	glUniform1fv(glGetUniformLocation(m_ShaderProgram.GetHandle(), "linearAttenuation"), Lights.size(), Light_linearAttenuation.data());
+// 	glUniform1fv(glGetUniformLocation(m_ShaderProgram.GetHandle(), "quadraticAttenuation"), Lights.size(), Light_quadraticAttenuation.data());
+// 	glUniform1fv(glGetUniformLocation(m_ShaderProgram.GetHandle(), "spotExponent"), Lights.size(), Light_spotExponent.data());
 	if (m_DrawWireframe)
 	{
 		glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
@@ -373,15 +373,19 @@ void Renderer::AddPointLightToDraw(
     glm::vec3 _specular,
     glm::vec3 _diffuse,
     float _specularExponent,
-	float _scale
+	float _ConstantAttenuation,
+	float _LinearAttenuation, 
+	float _QuadraticAttenuation
 )
 {
 	Light light;
 	light.Position = _position;
 	light.Diffuse = _diffuse;
 	light.Specular = _specular;
-	light.Scale = _scale;
 	light.SpecularExponent = _specularExponent;
+	light.ConstantAttenuation = _ConstantAttenuation;
+	light.LinearAttenuation = _LinearAttenuation;
+	light.QuadraticAttenuation = _QuadraticAttenuation;
 	light.SphereModelMatrix = CreateLightMatrix(light);
 	Lights.push_back(light);
 }
@@ -723,9 +727,12 @@ void Renderer::DrawLightScene()
 		glUniform3fv(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "ls"), 1, glm::value_ptr(light.Specular));
 		glUniform3fv(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "ld"), 1, glm::value_ptr(light.Diffuse));
 		glUniform3fv(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "lp"), 1, glm::value_ptr(light.Position));
-		glUniform1f(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "LightRadius"), light.Scale/2.f);
 		glUniform3f(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "CameraPosition"), m_Camera->Position().x, m_Camera->Position().y, m_Camera->Position().z);
 		glUniform1f(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "specularExponent"), light.SpecularExponent);
+		glUniform1f(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "ConstantAttenuation"), light.ConstantAttenuation);
+		glUniform1f(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "LinearAttenuation"), light.LinearAttenuation);
+		glUniform1f(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "QuadraticAttenuation"), light.QuadraticAttenuation);
+
  		glDrawArrays(GL_TRIANGLES, 0, m_sphereModel->Vertices.size());
 	};
 	glEnable (GL_DEPTH_TEST);
@@ -740,9 +747,14 @@ void Renderer::SetSphereModel( Model* _model )
 
 glm::mat4 Renderer::CreateLightMatrix(Light &_light)
 {
+	float c = _light.ConstantAttenuation;
+	float l = _light.LinearAttenuation;
+	float q = _light.QuadraticAttenuation;
+	float cutOffRadius = abs(sqrt((-4*c*q) + pow(l, 2) + (1024*q) - l) / (2*q));
+
 	glm::mat4 model;
 	model *= glm::translate(_light.Position);
-	model *= glm::scale(glm::vec3(_light.Scale));
+	model *= glm::scale(glm::vec3(cutOffRadius));
 	return model;
 }
 

src/Renderer.h

@@ -24,12 +24,6 @@ public:
 	int HEIGHT, WIDTH;
 
 	std::list<std::tuple<Model*, glm::mat4, bool, bool>> ModelsToRender;
-	
- 	std::vector<float> Light_constantAttenuation;
- 	std::vector<float> Light_linearAttenuation;
- 	std::vector<float> Light_quadraticAttenuation;
-	std::vector<float> Light_spotExponent;
-
 	std::list<std::tuple<glm::mat4, bool>> AABBsToRender;
 
 	Renderer();
@@ -45,7 +39,9 @@ public:
 	    glm::vec3 _specular,
 	    glm::vec3 _diffuse,
 	    float _specularExponent,
-		float _scale
+		float _ConstantAttenuation, 
+		float _LinearAttenuation, 
+		float _QuadraticAttenuation
 	);
 	void AddAABBToDraw(glm::vec3 origin, glm::vec3 volumeVector, bool colliding);
 
@@ -74,8 +70,8 @@ private:
 		glm::vec3 Specular;
 		glm::vec3 Diffuse;
 		float SpecularExponent;
-		float Scale;
 		glm::mat4 SphereModelMatrix;
+		float ConstantAttenuation, LinearAttenuation, QuadraticAttenuation;
 	};
 
 	float Gamma;

src/Shaders/Fragment.glsl

@@ -16,10 +16,10 @@ out vec4 frag_Normal;
 void main()
 {
 	// Diffuse Texture
-	frag_Diffuse = texture2D(DiffuseTexture, Input.TextureCoord);
+	frag_Diffuse = texture(DiffuseTexture, Input.TextureCoord);
 
 	// G-buffer Position
-	frag_Position = vec4(Input.Position.xyz, 0.0);
+	frag_Position = vec4(Input.Position.xyz, 1.0);
 
 	// G-buffer Normal
 	frag_Normal = vec4(Input.Normal, 0.0);

src/Shaders/Fragment2.glsl

@@ -12,15 +12,19 @@ uniform vec3 la;
 uniform vec3 ls;
 uniform vec3 ld;
 uniform vec3 lp;
-uniform float LightRadius;
 uniform float specularExponent;
 uniform vec3 CameraPosition;
+uniform float ConstantAttenuation;
+uniform float LinearAttenuation;
+uniform float QuadraticAttenuation;
 
 const vec3 ks = vec3(1.0, 1.0, 1.0);
 const vec3 kd = vec3(1.0, 1.0, 1.0);
 const vec3 ka = vec3(1.0, 1.0, 1.0);
 const float kshine = 1.0;
 
+
+
 in VertexData
 {
 	vec3 Position;
@@ -44,12 +48,15 @@ vec4 phong(vec3 position, vec3 normal)
 	vec3 surfaceToViewer = normalize(-position);
 	vec3 halfWay = normalize(surfaceToViewer + directionToLight);
 	float dotSpecular = max(dot(halfWay, normal), 0.0);
-	float specularFactor = pow(dotSpecular, specularExponent * 2);
+	float specularFactor = pow(dotSpecular, specularExponent * 2.0);
 	vec3 Is = ks * ls * specularFactor;
 
 	//Attenuation
 	float dist = distance(lightPos, position);
-	float attenuation = -log(min(1.0, dist / LightRadius));
+	//float attenuation = -log(min(1.0, dist / LightRadius));
+
+	float attenuation = 1.0 / (ConstantAttenuation + (LinearAttenuation * dist) + (QuadraticAttenuation * dist * dist));
+
 	//float attenuation = 1.0 / (1.0 - 0.0001 * pow(dist, 2));
 
 	//float attenuation = clamp(0.0, 1.0, 1.0 / (0.001 + (0.001 * dist) + (0.001 * dist * dist)));
@@ -62,9 +69,9 @@ vec4 phong(vec3 position, vec3 normal)
 	//att_s = 1.0 / (1.0 + att_s);
 	//attenuation = attenuation / (1.0 - att_s);
 
-	float radius = 5.0;
-	float alpha = dist / radius;
-	float dampingFactor = 1.0 - pow(alpha, 3);
+	//float radius = 5.0;
+	//float alpha = dist / radius;
+	//float dampingFactor = 1.0 - pow(alpha, 3);
 
 
 	return vec4((Id + Is) * attenuation, 1.0);

src/Shaders/Vertex2.glsl

@@ -15,5 +15,5 @@ void main()
 {
 	gl_Position = MVP * vec4(Position, 1.0);
 	Output.Position = Position;
-	Output.TextureCoord = (vec2(Position) + 1) / 2;
+	Output.TextureCoord = (vec2(Position) + 1.0) / 2.0;
 }

src/Systems/RenderSystem.cpp

@@ -39,7 +39,9 @@ void Systems::RenderSystem::UpdateEntity(double dt, EntityID entity, EntityID pa
 			pointLightComponent->Specular,
 			pointLightComponent->Diffuse,
 			pointLightComponent->specularExponent,
-			pointLightComponent->Scale
+			pointLightComponent->ConstantAttenuation,
+			pointLightComponent->LinearAttenuation,
+			pointLightComponent->QuadraticAttenuation
 			);
 	}