Started a simple font text class to do font rendering.

32-text-rendering/src/mesh.hpp

@@ -0,0 +1,72 @@
+#pragma once
+
+#include <glad/glad.h>
+#include <glm/glm.hpp>
+#include <glm/gtc/matrix_transform.hpp>
+
+#include "shader.hpp"
+
+#include <string>
+#include <vector>
+
+struct Vertex {
+  glm::vec3 position;
+  glm::vec3 normal;
+  glm::vec2 tex_coords;
+};
+
+struct TextureCounts {
+  unsigned int diffuseNr = 1;
+  unsigned int specularNr = 1;
+  unsigned int normalNr = 1;
+  unsigned int heightNr = 1;
+};
+
+struct Texture {
+  unsigned int id;
+  std::string type;
+  std::string path;
+  std::string target;
+  int uniform_id=-1;
+
+  Texture(unsigned int id, const std::string& type, const std::string& path, TextureCounts& count) :
+    id(id), type(type)
+  {
+    unsigned int number = 0;
+
+    if(type == "texture_diffuse") {
+      number = count.diffuseNr++;
+    } else if(type == "texture_specular") {
+      number = count.specularNr++;
+    } else if(type == "texture_normal") {
+      number = count.normalNr++;
+    } else if(type == "texture_height") {
+      number = count.heightNr++;
+    } else {
+      dbc::sentinel($F("Invalid texture type={} for file={}", type, path));
+    }
+
+    target = std::format("{}{}", type, number);
+  }
+};
+
+struct Mesh {
+  std::vector<Vertex> vertices;
+  std::vector<unsigned int> indices;
+  std::vector<Texture> textures;
+  unsigned int VAO = 0;
+  unsigned int VBO = 0;
+  unsigned int EBO = 0;
+
+  Mesh(std::vector<Vertex>& vertices, std::vector<unsigned int>& indices, std::vector<Texture>& textures) :
+    vertices(vertices),
+    indices(indices),
+    textures(textures)
+  {
+    setup_mesh();
+  }
+
+  void draw(Shader &shader, bool with_textures);
+  void setup_mesh();
+  void apply_textures(const Shader& shader);
+};