Basic lighting

src/kekengine/cpp/engine.cpp

@@ -152,7 +152,7 @@ int init() {
 	glfwSetInputMode(kekData.window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
 
 	glClearColor(0.1f, 0.3f, 0.1f, 0.0f);
-	//glfwSwapInterval(0);
+	// glfwSwapInterval(0);
 
 	stbi_set_flip_vertically_on_load(true);
 
@@ -217,6 +217,38 @@ int start() {
 		glUniformMatrix4fv(glGetUniformLocation(kekData.shader->id, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
 		glUniform3fv(glGetUniformLocation(kekData.shader->id, "cameraPos"), 1, glm::value_ptr(position));
 
+		LightList *lights = kekData.activeScene->lights;
+
+		std::vector<Light *> shaderLights;
+
+		for(PointLight *light : lights->point) {
+			if(glm::abs(light->getPosition() - kekData.activeCamera->getPosition()).length() < 10) {
+				shaderLights.push_back(light);
+			}
+		}
+
+		glUniform1i(glGetUniformLocation(kekData.shader->id, "numPointLights"), 1);
+
+		unsigned int i = 0;
+		for(Light *light : shaderLights) {
+			std::string prefix = "lights[" + std::to_string(i) + "].";
+
+			switch(light->getType()) {
+				case LightType::POINT:
+				{
+					PointLight *l = (PointLight *) light;
+					glUniform3fv(glGetUniformLocation(kekData.shader->id, (prefix + "position").c_str()), 1, glm::value_ptr(l->getPosition()));
+					glUniform3fv(glGetUniformLocation(kekData.shader->id, (prefix + "color").c_str()), 1, glm::value_ptr(l->color));
+					glUniform3fv(glGetUniformLocation(kekData.shader->id, (prefix + "attenuation").c_str()), 1, glm::value_ptr(glm::vec3(l->constant, l->linear, l->quadratic)));
+				}
+				case LightType::DIRECTIONAL:
+				case LightType::SPOT:
+					break;
+			}
+
+			i++;
+		}
+
 		if(kekData.activeScene) kekData.activeScene->draw(kekData.shader);
 
 		// Swap buffers and poll window events
@@ -225,8 +257,8 @@ int start() {
 
 		auto end = std::chrono::high_resolution_clock::now();
 		std::chrono::duration<float> secsTaken = end - start;
-		//std::cout << "FT: " << secsTaken.count() * 1000 << std::endl;
-		//std::cout << "FR: " << (1.0f / secsTaken.count()) << std::endl;
+		// std::cout << "FT: " << secsTaken.count() * 1000 << std::endl;
+		// std::cout << "FR: " << (1.0f / secsTaken.count()) << std::endl;
 	}
 
 	return KEK_SUCCESS;

src/kekengine/cpp/light.cpp

@@ -0,0 +1,44 @@
+#include <vector>
+
+#include "light.h"
+#include "constants.h"
+
+namespace kek {
+
+Light::Light(glm::vec3 color) {
+	this->color = color;
+}
+
+Light::~Light() {
+
+}
+
+PointLight::PointLight(glm::vec3 color, float constantFalloff, float linearFalloff, float quadraticFalloff): Light(color) {
+	this->constant = constantFalloff;
+	this->linear = linearFalloff;
+	this->quadratic = quadraticFalloff;
+}
+
+PointLight::~PointLight() {
+
+}
+
+LightType PointLight::getType() {
+	return LightType::POINT;
+}
+
+LightList::LightList() {
+	point = std::vector<PointLight *>();
+	//directional = std::vector<DirectionalLight *>();
+	//spot = std::vector<SpotLight *>();
+}
+
+void LightList::add(Light *light) {
+	switch(light->getType()) {
+		case LightType::POINT: point.push_back((PointLight *) light); break;
+		//case LightType::DIRECTIONAL: directional.push_back((DirectionalLight *) light); break;
+		//case LightType::SPOT: spot.push_back((SpotLight *) light); break;
+	}
+}
+
+}

src/kekengine/cpp/mesh.cpp

@@ -24,30 +24,30 @@ Mesh::Mesh(std::vector<Vertex> vertices, std::vector<uint32_t> indices, Material
 	this->indices = indices;
 	this->material = material;
 
-	glGenVertexArrays(1, &vao);
-	glGenBuffers(1, &vbo);
-	glGenBuffers(1, &ebo);
+	glCreateVertexArrays(1, &vao);
+	glCreateBuffers(1, &vbo);
+	glCreateBuffers(1, &ebo);
 
-	glBindVertexArray(vao);
+	//glBindVertexArray(vao);
 
-	glBindBuffer(GL_ARRAY_BUFFER, vbo);
-	glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(Vertex), &vertices[0], GL_STATIC_DRAW);
-	//glBindBuffer(GL_ARRAY_BUFFER, 0);
+	glNamedBufferData(vbo, vertices.size() * sizeof(Vertex), &vertices[0], GL_STATIC_DRAW);
+	glNamedBufferData(ebo, indices.size() * sizeof(unsigned int), &indices[0], GL_STATIC_DRAW);
 
-	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo);
-	glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.size() * sizeof(unsigned int), &indices[0], GL_STATIC_DRAW);
-	//glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+	glVertexArrayVertexBuffer(vao, 0, vbo, 0, sizeof(Vertex));
 
-	glVertexAttribPointer(KEK_VERTEX_SHADER_IN_POSITION, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), 0);
-	glEnableVertexAttribArray(KEK_VERTEX_SHADER_IN_POSITION);
+	glEnableVertexArrayAttrib(vao, KEK_VERTEX_SHADER_IN_POSITION);
+	glVertexArrayAttribFormat(vao, KEK_VERTEX_SHADER_IN_POSITION, sizeof(float), GL_FLOAT, GL_FALSE, 0);
+	glVertexArrayAttribBinding(vao, KEK_VERTEX_SHADER_IN_POSITION, 0);
 
-	glVertexAttribPointer(KEK_VERTEX_SHADER_IN_NORMAL, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void *) offsetof(Vertex, normal));
-	glEnableVertexAttribArray(KEK_VERTEX_SHADER_IN_NORMAL);
+	glEnableVertexArrayAttrib(vao, KEK_VERTEX_SHADER_IN_NORMAL);
+	glVertexArrayAttribFormat(vao, KEK_VERTEX_SHADER_IN_NORMAL, sizeof(float), GL_FLOAT, GL_FALSE, offsetof(Vertex, normal));
+	glVertexArrayAttribBinding(vao, KEK_VERTEX_SHADER_IN_NORMAL, 0);
 
-	glVertexAttribPointer(KEK_VERTEX_SHADER_IN_TEXCOORD, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void *) offsetof(Vertex, texCoords));
-	glEnableVertexAttribArray(KEK_VERTEX_SHADER_IN_TEXCOORD);
+	glEnableVertexArrayAttrib(vao, KEK_VERTEX_SHADER_IN_TEXCOORD);
+	glVertexArrayAttribFormat(vao, KEK_VERTEX_SHADER_IN_TEXCOORD, sizeof(float), GL_FLOAT, GL_FALSE, offsetof(Vertex, texCoords));
+	glVertexArrayAttribBinding(vao, KEK_VERTEX_SHADER_IN_TEXCOORD, 0);
 
-	glBindVertexArray(0);
+	glVertexArrayElementBuffer(vao, ebo);
 
 	GLenum err = glGetError();
 	if(err != GL_NO_ERROR) {

src/kekengine/cpp/scene.cpp

@@ -3,11 +3,13 @@
 namespace kek {
 
 Scene::Scene() {
-
+	this->lights = new LightList();
 }
 
 Scene::~Scene() {
 	for(GameObject *obj : objects) delete obj;
+	for(Light *l : lights->point) delete l;
+	delete lights;
 }
 
 void Scene::addObject(GameObject *object) {

src/kekengine/include/constants.h

@@ -9,3 +9,8 @@
 
 #define KEK_CAMERA_NEAR 0.1f
 #define KEK_CAMERA_FAR 100.0f
+
+#define KEK_LIGHT_LIMIT 8 // Also in shader/mesh/fragment.glsl
+
+#define KEK_LIGHT_DEFAULT_AMBIENT_STRENGTH 0.05f
+#define KEK_LIGHT_DEFAULT_SPECULAR_STRENGTH 0.1f

src/kekengine/include/light.h

@@ -0,0 +1,55 @@
+#pragma once
+
+#include <glm/glm.hpp>
+#include <vector>
+
+#include "object.h"
+
+namespace kek {
+
+enum class LightType {
+	POINT,
+	DIRECTIONAL,
+	SPOT
+};
+
+class Light {
+
+public:
+	glm::vec3 color;
+
+	Light(glm::vec3 color);
+
+	virtual ~Light();
+
+	virtual LightType getType() = 0;
+
+};
+
+class PointLight: public Light, public DefaultObject {
+
+public:
+	float constant, linear, quadratic;
+
+	PointLight(glm::vec3 color, float constant, float linear, float quadratic);
+
+	~PointLight();
+
+	LightType getType();
+
+};
+
+class LightList {
+
+public:
+	std::vector<PointLight *> point;
+	//std::vector<DirectionalLight *> directional;
+	//std::vector<SpotLight *> spot;
+
+	LightList();
+
+	void add(Light *light);
+
+};
+
+}

src/kekengine/include/scene.h

@@ -3,15 +3,16 @@
 #include <vector>
 
 #include "gameobject.h"
+#include "light.h"
 
 namespace kek {
 
 class Scene {
 
-protected:
-	std::vector<GameObject *> objects;
-
 public:
+	std::vector<GameObject *> objects;
+	LightList *lights;
+
 	Scene();
 
 	~Scene();

src/kekengine/res/shader/include/lightcalc.glsl

@@ -1,21 +1,21 @@
-vec3 calcPointLight(PointLight light, vec3 normal, vec3 fragPos, vec3 viewDir, vec2 texCoord, float shadow) {
+vec3 calcPointLight(Light light, vec3 normal, vec3 fragPos, vec3 viewDir, vec2 texCoord, float shadow) {
 	vec3 lightDir = normalize(light.position - fragPos);
 	vec3 halfwayDir = normalize(lightDir + viewDir);
 
 	// Ambient
-	vec3 ambient = light.ambient * vec3(texture(material.diffuse, texCoord));
+	vec3 ambient = light.color * vec3(texture(material.ambient, texCoord));
 
 	// Diffuse
 	float diff = max(dot(normal, lightDir), 0.0);
-	vec3 diffuse = light.diffuse * diff * vec3(texture(material.diffuse, texCoord));
+	vec3 diffuse = light.color * diff * vec3(texture(material.diffuse, texCoord));
 
 	// Specular
 	float spec = pow(max(dot(normal, halfwayDir), 0.0), material.shininess);
-	vec3 specular = light.specular * spec * vec3(texture(material.specular, texCoord));
+	vec3 specular = light.color * spec * vec3(texture(material.specular, texCoord));
 
 	// Attenuation
 	float dist = length(light.position - fragPos);
-	float attenuation = 1.0 / (light.constant + light.linear * dist + light.quadratic * (dist * dist));
+	float attenuation = 1.0 / (light.attenuation.x + light.attenuation.y * dist + light.attenuation.z * (dist * dist));
 
 	ambient *= attenuation;
 	diffuse *= attenuation;

src/kekengine/res/shader/include/types.glsl

@@ -5,41 +5,11 @@ struct Material {
 	float shininess;
 };
 
-struct PointLight {
-	vec3 position;
-
-	vec3 ambient;
-	vec3 diffuse;
-	vec3 specular;
-
-	float constant;
-	float linear;
-	float quadratic;
-};
-
-struct DirectionalLight {
-	vec3 direction;
-
-	vec3 ambient;
-	vec3 diffuse;
-	vec3 specular;
-
-	mat4 lightSpaceMatrix;
-};
-
-struct SpotLight {
+struct Light {
 	vec3 position;
 	vec3 direction;
-	float innerCutOff;
-	float outerCutOff;
-
-	vec3 ambient;
-	vec3 diffuse;
-	vec3 specular;
-
-	float constant;
-	float linear;
-	float quadratic;
-
+	vec3 color;
+	vec3 attenuation;
+	vec2 cutoff;
 	mat4 lightSpaceMatrix;
 };

src/kekengine/res/shader/mesh/fragment.glsl

@@ -8,21 +8,32 @@ in VS_OUT {
 
 !include types.glsl
 
+uniform Light lights[8];
+uniform int numPointLights;
+
 uniform Material material;
 
 uniform vec3 cameraPos;
 
 out vec4 color;
 
+const float gamma = 2.2;
+
 !include lightcalc.glsl
 
 void main() {
-	vec3 norm = normalize(fs_in.normal);
+	vec3 normal = normalize(fs_in.normal);
 	vec3 viewDir = normalize(cameraPos - fs_in.fragmentPosition);
 	//color = length(fs_in.fragmentPosition) / 2 * vec4(1.0);
 	//color = vec4(norm, 1.0);
 
 	color = texture(material.diffuse, fs_in.textureCoordinate);
 
-	//PointLight light = {};
+	vec3 result = vec3(0.0);
+
+	for(int i = 0; i < numPointLights; i++) {
+		result += calcPointLight(lights[i], normal, fs_in.fragmentPosition, viewDir, fs_in.textureCoordinate, 0.0);
+	}
+
+	color = vec4(pow(result, vec3(1.0 / gamma)), 1.0);
 }

src/kekgame/cpp/kekgame.cpp

@@ -19,13 +19,16 @@ int main(int argc, char **argv) {
 	Scene *scene = new Scene();
 	scene->addObject(test);
 
-	for(int i = 0; i < 1; i++) {
+	for(int i = 0; i < 10; i++) {
 		GameObject *test2 = new GameObject();
 		test2->addMesh(ObjParser::loadMesh("object/cube_colored/Cube.obj"));
 		test2->moveTo(glm::vec3(0.0f, 5.0f, 3 * i));
 		scene->addObject(test2);
 	}
 
+	PointLight *light = new PointLight(glm::vec3(1), 1, 1, 1);
+	scene->lights->add(light);
+
 	Engine::setActiveScene(scene);
 
 	Engine::start();