3d transform

headers/shader.hpp

@@ -1,6 +1,7 @@
 #ifndef SHADER_H
 #define SHADER_H
 #include <glad/glad.h>
+#include <glm/glm.hpp>
 #include <string>
 
 class Shader {
@@ -10,6 +11,7 @@ public:
   void use();
   void setInt(const std::string &name, int value);
   void setFloat(const std::string &name, float value);
+  void setMat4(const std::string &name, glm::mat4 value);
 
 private:
   unsigned int ID;

shaders/MVPTexVert.glsl

@@ -0,0 +1,18 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aColor;
+layout (location = 2) in vec2 aTexCoord;
+
+out vec3 ourColor;
+out vec2 TexCoord;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main()
+{
+    gl_Position = projection * view * model * vec4(aPos, 1.0);
+    ourColor = aColor;
+    TexCoord = aTexCoord;
+}

src/main.cpp

@@ -1,5 +1,8 @@
 #include <glad/glad.h>
 #include <GLFW/glfw3.h>
+#include <glm/glm.hpp>
+#include <glm/gtc/matrix_transform.hpp>
+#include <glm/gtc/type_ptr.hpp>
 #include <cassert>
 #include <iostream>
 #include <shader.hpp>
@@ -54,7 +57,7 @@ int main(void) {
                GL_STATIC_DRAW);
 
   Shader *shaderProgram =
-      new Shader("./shaders/TexVert.glsl", "./shaders/TexFrag.glsl");
+      new Shader("./shaders/MVPTexVert.glsl", "./shaders/TexFrag.glsl");
 
   unsigned int texture;
   glGenTextures(1, &texture);
@@ -80,6 +83,12 @@ int main(void) {
   stbi_image_free(data);
 
   while (!glfwWindowShouldClose(window)) {
+    glm::mat4 model = glm::mat4(1.0f); /*move model*/
+    glm::mat4 view = glm::mat4(1.0f); /*move camera*/
+    view = glm::translate(view, glm::vec3(0.0f, 0.0f, -3.0f));
+    model = glm::rotate(model, glm::radians(-55.0f), glm::vec3(1.0f, 0.0f, 0.0f));
+    glm::mat4 projection = glm::perspective(glm::radians(45.0f), 800.0f / 600.0f, 0.1f, 100.0f); /*camera settings*/
+
     processInput(window);
 
     glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
@@ -87,6 +96,10 @@ int main(void) {
 
     shaderProgram->use();
     shaderProgram->setInt("Tex0",0);
+    shaderProgram->setMat4("model",model);
+    shaderProgram->setMat4("view",view);
+    shaderProgram->setMat4("projection",projection);
+
     glActiveTexture(GL_TEXTURE0);
     glBindTexture(GL_TEXTURE_2D, texture);
     glBindVertexArray(VAO);

src/shader.cpp

@@ -1,5 +1,6 @@
 #include <fstream>
 #include <glad/glad.h>
+#include <glm/gtc/type_ptr.hpp>
 #include <iostream>
 #include <shader.hpp>
 #include <sstream>
@@ -44,6 +45,11 @@ void Shader::setFloat(const std::string &name, float value) {
   glUniform1f(glGetUniformLocation(ID, name.c_str()), value);
 }
 
+void Shader::setMat4(const std::string &name, glm::mat4 value) {
+  glUniformMatrix4fv(glGetUniformLocation(ID, name.c_str()), 1, GL_FALSE, glm::value_ptr(value));
+
+}
+
 /*priv*/
 unsigned int Shader::shaderCMPL(GLenum type, const char *src) {
   unsigned int shader;