67 lines
2.2 KiB
C++
67 lines
2.2 KiB
C++
#include <glad/glad.h>
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#include <glml/Mesh.h>
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using namespace glml;
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Mesh::Mesh(const std::vector<Vertex>& vertices,
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const std::vector<unsigned int>& indices,
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const std::vector<Texture>& textures) : vertices(vertices), indices(indices), textures(textures)
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{
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setupMesh();
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}
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void Mesh::setupMesh()
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{
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glGenVertexArrays(1, &VAO);
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glGenBuffers(1, &VBO);
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glGenBuffers(1, &EBO);
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glBindVertexArray(VAO);
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glBindBuffer(GL_ARRAY_BUFFER, VBO);
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glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(Vertex), &vertices[0], GL_STATIC_DRAW);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.size() * sizeof(unsigned int), &indices[0], GL_STATIC_DRAW);
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (const void*)offsetof(Vertex, Position));
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glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (const void*)offsetof(Vertex, Normal));
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glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), (const void*)offsetof(Vertex, TexCoord));
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glVertexAttribPointer(3, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (const void*)offsetof(Vertex, Tangent));
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glVertexAttribPointer(4, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (const void*)offsetof(Vertex, Bitangent));
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for (int i = 0; i < 5; i++)
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glEnableVertexAttribArray(i);
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glBindVertexArray(0);
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}
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void Mesh::Draw(const Shader& shader) const
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{
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unsigned int diffNr = 0;
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unsigned int specNr = 0;
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unsigned int normNr = 0;
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unsigned int heigNr = 0;
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for (int i = 0; i < textures.size(); i++)
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{
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std::string name = TextureTypeStrings[static_cast<size_t>(textures[i].type)];
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if (textures[i].type == TextureType::diffuse)
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name += std::to_string(diffNr++);
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else if (textures[i].type == TextureType::specular)
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name += std::to_string(specNr++);
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else if (textures[i].type == TextureType::normal)
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name += std::to_string(normNr++);
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else if (textures[i].type == TextureType::height)
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name += std::to_string(heigNr++);
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glActiveTexture(GL_TEXTURE0 + i);
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shader.setInt("material." + name, i);
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glBindTexture(GL_TEXTURE_2D, textures[i].id);
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}
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glActiveTexture(GL_TEXTURE0);
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glBindVertexArray(VAO);
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glDrawElements(GL_TRIANGLES, indices.size(), GL_UNSIGNED_INT, 0);
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glBindVertexArray(0);
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} |