Spotlight still in the works

BaseGLProject/Light.cpp

@@ -5,12 +5,14 @@ Light::Light(glm::vec3 intensity_, glm::vec4 location_) : location(location_), i
 	type = BASE;
 }
 
-Light::Light(glm::vec3 intensity_, glm::vec4 location_, float spot_cutoff_, float spot_inner_cutoff_, float spot_exponent_, glm::vec3 direction_):
+Light::Light(glm::vec3 intensity_, glm::vec4 location_, float spot_cutoff_, float spot_inner_cutoff_, float spot_exponent_,
+	glm::vec4 lookAtPosition_):
 	location(location_), intensity(intensity_), spot_cutoff(spot_cutoff_), spot_inner_cutoff(spot_inner_cutoff_)
-	,spot_exponent(spot_exponent_), direction(direction_)
+	,spot_exponent(spot_exponent_)
 	
 {
 	type = SPOT;
+	direction = lookAtPosition_;
 }
 
 

BaseGLProject/Light.h

@@ -13,7 +13,9 @@ public:
 	};
 
 	Light(glm::vec3 intensity, glm::vec4 location);
-	Light(glm::vec3 intensity, glm::vec4 location, float spot_cutoff, float spot_inner_cutoff, float spot_exponent, glm::vec3 direction);
+	Light(glm::vec3 intensity, glm::vec4 location,
+		float spot_cutoff, float spot_inner_cutoff,
+		float spot_exponent, glm::vec4 lookAt);
 	~Light();
 
 	bool activated = true;
@@ -23,6 +25,7 @@ public:
 	float spot_cutoff;
 	float spot_inner_cutoff;
 	float spot_exponent;
-	glm::vec3 direction;	
+	glm::vec4 lookAt;
+	glm::vec3 direction;
 };
 

BaseGLProject/MyGLWindow.cpp

@@ -102,7 +102,8 @@ void MyGlWindow::shaderSetup()
 void MyGlWindow::lightSetup()
 {
 	//Showcase lights
-	_scnctx.lights.emplace("Light1", Light(glm::vec3(0.8f), glm::vec4(3, 10, 5, 1)));
+	_scnctx.lights.emplace("Spotlight1", Light(glm::vec3(0.8f), glm::vec4(3, 10, 5, 1),
+		24, 12, 2, glm::vec4(0, 1, 0, 1)));
 
 	//Party lights
 	/*_scnctx.lights.emplace("Light1", Light(glm::vec3(0.0f, 0.5f, 0.5f), glm::vec4(10, 10, 0, 1)));
@@ -120,11 +121,11 @@ void MyGlWindow::setup()
 	
 	Dataset moddata;
 	moddata.checkeredFloor(20, 20, glm::vec3(0.1, 0.1, 0.1), glm::vec3(0.7, 0.7, 0.7));			
-	meshes.emplace("Floor", new Mesh(moddata, shaders["Simple"]));
+	meshes.emplace("Floor", new Mesh(moddata, shaders["SpotLight"]));
 	meshes["Floor"]->addTranslation(glm::vec4(0, -0.05, 0, 1));
 	meshes["Floor"]->cullMode = BACK;
 
-	moddata.simpleCube();	
+	/*moddata.simpleCube();	
 	meshes.emplace("Cube", new Mesh(moddata, shaders["BrickBaseLight"]));	
 	meshes["Cube"]->addTranslation(glm::vec4(0, 1, 0, 1));
 
@@ -137,7 +138,7 @@ void MyGlWindow::setup()
 	meshes["TeapotSilhouette"]->cullMode = FRONT;
 	meshes.emplace("Teapot", new Mesh("teapot.obj", shaders["Toon"]));
 	meshes["Teapot"]->addTranslation(glm::vec4(5, 0, 3, 1));
-	meshes["Teapot"]->cullMode = BACK;
+	meshes["Teapot"]->cullMode = BACK;*/
 	
 }
 
@@ -157,6 +158,8 @@ void MyGlWindow::draw()
 	
 	_scnctx.viewMatrix = view;
 	_scnctx.projectionMatrix = projection;
+
+	_scnctx.adjustSpots();
 	for (auto it = meshes.begin(); it != meshes.end(); it++)
 		(*it).second->draw(_scnctx);
 }

BaseGLProject/SceneContext.h

@@ -18,4 +18,16 @@ struct SceneContext
 	glm::mat3x3 normalMatrix;
 
 	std::map<std::string, Texture> textures;
+
+	void adjustSpots()
+	{
+		for (auto it : lights)
+		{
+			if (it.second.type == Light::SPOT)
+			{
+				it.second.location = it.second.location * viewMatrix;
+				it.second.direction = (viewMatrix * it.second.lookAt - it.second.location * viewMatrix);
+			}
+		}
+	}
 };

BaseGLProject/spotlight.frag

@@ -43,27 +43,22 @@ void main()
 		vec3 V = normalize(-pos);	
 		//vec3 R = normalize(reflect(-L, N));
 		vec3 H = normalize(V + L);
-		float SpotAttenuation = 1.0;
-		vec spotDot = dot(Light[i].SpotCutoff, Light[i].SpotInnerCutoff);
-		float theta = dot(L, normalize(Light[i].SpotDirection)); //Angle between the light direction and the fragment-light vector.
-		float phi = ; // Angle between the light direction and the inner cutoff.
+		float SpotAttenuation = 1.0;		
+		float spotDot = dot(-L, normalize(Light[i].SpotDirection));		
 
-		
-
-		if (theta < Light[i].SpotInnerCutoff)
-		{		
-			SpotAttenuation = 1.0;  //No change in the attenuation
-		}
-		else 
+		if (spotDot > cos(radians(Light[i].SpotInnerCutoff)))
 		{
 			//Fragment is outside the Cone
 			//Interpolate between cos(Innercutoff )and cos(cutoff) with cos(theta)
-			float Spot = smoothstep(cos(Light[i].SpotCutoff),cos(Light[i].SpotInnerCutoff),cos(theta));
-			SpotAttenuation = pow(Spot, Light[i].SpotExponent);
+			float spotValue = smoothstep(cos(radians(Light[i].SpotCutoff)),
+									cos(radians(Light[i].SpotInnerCutoff)),
+									spotDot);		
+			SpotAttenuation = pow(spotValue, Light[i].SpotExponent);
 		}
 
 		attenuation *= SpotAttenuation;
 
+		vec3 ambient = Ka * Light[i].Intensity * attenuation;
 		vec3 diffuse = Kd * Light[i].Intensity * max(dot(L, N), 0.0) * attenuation;	
 		vec3 specular = Ks * Light[i].Intensity * pow(max(dot(H, N), 0.0), Shininess) * attenuation;