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Commit of work up to day 11 of learnopengl.com.

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This commit is contained in:
Zed A. Shaw 2026-08-21 13:15:55 -04:00
commit 5ce5b4dda4
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57
09-basic-light-materials/src/mesh.cpp Normal file
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#include "mesh.hpp"
void Mesh::Draw(Shader &shader) {
unsigned int diffuseNr = 1;
unsigned int specularNr = 1;
unsigned int normalNr = 1;
unsigned int heightNr = 1;
for(unsigned int i = 0; i < textures.size(); i++) {
glActiveTexture(GL_TEXTURE0 + i);
std::string number;
std::string name = textures[i].type;
if(name == "texture_diffuse") {
number = std::to_string(diffuseNr++);
} else if(name == "texture_specular") {
number = std::to_string(specularNr++);
} else if(name == "texture_normal") {
number = std::to_string(normalNr++);
} else if(name == "texture_height") {
number = std::to_string(heightNr++);
}
// TODO: Get this uniform ID once and cache it?
glUniform1i(glGetUniformLocation(shader.ID, (name + number).c_str()), i);
glBindTexture(GL_TEXTURE_2D, textures[i].id);
}
glBindVertexArray(VAO);
glDrawElements(GL_TRIANGLES, static_cast<unsigned int>(indices.size()), GL_UNSIGNED_INT, 0);
glBindVertexArray(0);
glActiveTexture(GL_TEXTURE0);
}
void Mesh::setupMesh() {
glGenVertexArrays(1, &VAO);
glGenBuffers(1, &VBO);
glGenBuffers(1, &EBO);
glBindVertexArray(VAO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(Vertex), vertices.data(), GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.size() * sizeof(unsigned int), indices.data(), GL_STATIC_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, Position));
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, Normal));
glEnableVertexAttribArray(2);
glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, TexCoords));
}