what the mesh?!
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7215fd5433
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36
src/mesh.cpp
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36
src/mesh.cpp
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#include <GL/glew.h>
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#include <GL/gl.h>
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#include "mesh.h"
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Mesh::Mesh(int vertexCount, float *vertices) {
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// Generate buffers
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glGenBuffers(1, &VBO);
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glGenVertexArrays(1, &VAO);
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// Bind vertex data to VBO
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glBindBuffer(GL_ARRAY_BUFFER, VBO);
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glBufferData(GL_ARRAY_BUFFER, vertexCount * (3 + 3 + 2) * sizeof(float), vertices, GL_STATIC_DRAW);
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// Bind vertex attributes to VAO
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glBindVertexArray(VAO);
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(0 * sizeof(float)));
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(3 * sizeof(float)));
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glEnableVertexAttribArray(1);
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glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(6 * sizeof(float)));
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glEnableVertexAttribArray(2);
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}
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Mesh::~Mesh() {
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glDeleteBuffers(1, &VBO);
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glDeleteVertexArrays(1, &VAO);
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}
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void Mesh::bind() {
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glBindBuffer(GL_ARRAY_BUFFER, VBO);
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glBindVertexArray(VAO);
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}
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10
src/mesh.h
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10
src/mesh.h
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@ -0,0 +1,10 @@
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#pragma once
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class Mesh {
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unsigned int VBO, VAO;
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public:
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Mesh(int vertexCount, float* vertices);
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~Mesh();
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void bind();
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};
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@ -1,38 +1,28 @@
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#include <GL/glew.h>
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#include <GLFW/glfw3.h>
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#include <GL/gl.h>
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#include <memory>
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#include "shader.h"
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#include "mesh.h"
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#include "renderer.h"
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float verts[] {
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0.5f, 1.0f, 0.0f,
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0.0f, 0.0f, 0.0f,
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1.0f, 0.0f, 0.0f,
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// position // normals // tex coords
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0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f,
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0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f,
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1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f,
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};
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unsigned int VAO, VBO;
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Shader *shader = NULL;
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Mesh *triangleMesh = NULL;
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void renderInit(GLFWwindow* window) {
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glViewport(0, 0, 500, 500);
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glGenBuffers(1, &VBO);
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glGenVertexArrays(1, &VAO);
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// Bind vertex data to VBO
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glBindBuffer(GL_ARRAY_BUFFER, VBO);
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glBufferData(GL_ARRAY_BUFFER, sizeof(verts), verts, GL_STATIC_DRAW);
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// Bind vertex attributes to VAO
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glBindVertexArray(VAO);
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
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glEnableVertexAttribArray(0);
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// Compile shader
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shader = new Shader("assets/shaders/orange.vs", "assets/shaders/orange.fs");
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triangleMesh = new Mesh(3, verts);
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}
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void render(GLFWwindow* window) {
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@ -42,6 +32,6 @@ void render(GLFWwindow* window) {
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// Use shader
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shader->use();
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glBindVertexArray(VAO);
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triangleMesh->bind();
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glDrawArrays(GL_TRIANGLES, 0, 3);
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}
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