Added the camera position and the models position to pbr shader

data/shaders/pbrFragment.glsl

@@ -4,9 +4,12 @@ out vec4 FragColor;
 in vec2 ourTexCoord;
 in vec3 ourNormCoord;
 in vec3 FragPos;
+
 // TODO: make temporary hard coded world/camera pos dynamic
-vec3 WorldPos = vec3(0.0f, 0.0f, 0.0f);
-vec3 CameraPos = vec3(0.0f, 0.0f, -1.0f);
+uniform vec3 WorldPos ;
+uniform vec3 CameraPos;
+//vec3 WorldPos = vec3(0.0f, 0.0f, 0.0f);
+//vec3 CameraPos = vec3(0.0f, 0.0f, -1.0f);
 //TODO: make these values rely on associated textures.
 vec3 albedo = vec3(0.8f, 0.8f, 0.8f);
 float metallic = 0.3f;
@@ -112,6 +115,6 @@ void main()
    color = color / (color + vec3(1.0));
    color = pow(color, vec3(1.0/2.2));
 
-   //FragColor = vec4(color, 1.0);
+   //FragColor = vec4(CameraPos, 1.0);
    FragColor = texture(texture_diffuse1, ourTexCoord) * vec4(color, 0.0);
 }

data/shaders/pbrVertex.glsl

@@ -0,0 +1,21 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aNormal;
+layout (location = 2) in vec2 aTexCoord;
+
+uniform mat4 MVP;
+uniform mat4 Model;
+
+out vec2 ourTexCoord;
+out vec3 ourNormCoord;
+out vec3 FragPos;
+
+void main()
+{
+   gl_Position = MVP * Model * vec4(aPos, 1.0);
+   ourNormCoord = aNormal;
+   ourTexCoord = aTexCoord;
+
+   // Calculate position of fragment
+   FragPos = vec3(Model * vec4(aPos, 1.0));
+};

src/Model.cpp

@@ -7,6 +7,7 @@ Model::Model(std::vector<Mesh> meshes) { this->meshes = meshes; }
 void Model::draw(ShaderLoader &shader) {
   for (unsigned int i = 0; i < this->meshes.size(); i++) {
     shader.setMat4("Model", this->model);
+    shader.setVec3("WorldPos", this->position);
     this->meshes[i].draw(shader);
   }
 }

src/PlayerCamera.cpp

@@ -57,3 +57,4 @@ void PlayerCamera::tick() {
 }
 
 glm::mat4 PlayerCamera::getMVP() { return MVP; }
+glm::vec3 PlayerCamera::getCameraPosition() { return cameraPosition; }

src/PlayerCamera.h

@@ -37,4 +37,5 @@ public:
   void tick();
 
   glm::mat4 getMVP();
+  glm::vec3 getCameraPosition();
 };

src/ShaderLoader.cpp

@@ -92,3 +92,7 @@ void ShaderLoader::setMat4(const std::string &name, glm::mat4 value) const {
   glUniformMatrix4fv(glGetUniformLocation(ID, name.c_str()), 1, GL_FALSE,
                      &value[0][0]);
 }
+void ShaderLoader::setVec3(const std::string &name, glm::vec3 value) const {
+  glUniform3fv(glGetUniformLocation(ID, name.c_str()), 1,
+               glm::value_ptr(value));
+}

src/ShaderLoader.h

@@ -6,6 +6,7 @@
 #include "Error.h"
 #include <fstream>
 #include <glm/glm.hpp>
+#include <glm/gtc/type_ptr.hpp>
 #include <iostream>
 #include <sstream>
 #include <string>
@@ -27,4 +28,5 @@ public:
   void setInt(const std::string &name, int value) const;
   void setFloat(const std::string &name, float value) const;
   void setMat4(const std::string &name, glm::mat4 value) const;
+  void setVec3(const std::string &name, glm::vec3 value) const;
 };

src/main.cpp

@@ -66,7 +66,7 @@ int main(int argc, char **argv) {
   // Create event handling struct
   SDL_Event input;
 
-  ShaderLoader shader(ROOT_DIR "data/shaders/vertex.glsl",
+  ShaderLoader shader(ROOT_DIR "data/shaders/pbrVertex.glsl",
                       ROOT_DIR "data/shaders/pbrFragment.glsl");
 
   Model backpack(std::string(ROOT_DIR) +
@@ -117,6 +117,7 @@ int main(int argc, char **argv) {
 
     // Send our glsl shader our mvp
     shader.setMat4("MVP", camera.getMVP());
+    shader.setVec3("CameraPos", camera.getCameraPosition());
 
     // Draw Meshes
     cube.draw(shader);