learn-opengl/19-blending-facecull/src/mesh.hpp
2026-08-30 13:51:01 -04:00

72 lines
1.6 KiB
C++

#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);
void setup_mesh();
void apply_textures(const Shader& shader);
};