OpenGL-ocean/Mesh.cpp at main · sheeepsoup/OpenGL-ocean · GitHub

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#include "Mesh.h"


Mesh::Mesh(float vertices[])
{

	this->vertices.resize(36);
	memcpy(&this->vertices[0], vertices, 36 * 8 * sizeof(float));
	setupMesh();
	printf("w");
}

Mesh::Mesh(std::vector<Vertex> vertices, std::vector<unsigned int> indices, std::vector<Texture> textures)
{
	this->vertices = vertices;//this指类里的,区分同名的
	this->indices = indices;
	this->textures = textures;

	setupMesh();
}

void Mesh::Draw(Shader* shader)
{
	//遍历材质
	for (unsigned int i = 0; i < textures.size(); i++) {
		if (textures[i].type == "texture_diffuse") {
			glActiveTexture(GL_TEXTURE0);
			glBindTexture(GL_TEXTURE_2D, textures[i].id);
			glUniform1i(glGetUniformLocation(shader->ID, "material.diffuse"), 0);

		}
		else if (textures[i].type == "texture_specular") {
			glActiveTexture(GL_TEXTURE1);
			glBindTexture(GL_TEXTURE_2D, textures[i].id);
			glUniform1i(glGetUniformLocation(shader->ID, "material.specular"), 1);

		}


	}
	glBindVertexArray(VAO);
	//glDrawArrays(GL_TRIANGLES, 0, 36);
	glDrawElements(GL_TRIANGLES, indices.size(), GL_UNSIGNED_INT, 0);
	glBindVertexArray(0);
	glActiveTexture(GL_TEXTURE0);
}

void Mesh::setupMesh()
{
	glGenBuffers(1, &VBO);
	glBindBuffer(GL_ARRAY_BUFFER, VBO);
	glBufferData(GL_ARRAY_BUFFER, sizeof(Vertex) * vertices.size(), &vertices[0], GL_STATIC_DRAW);

	glGenVertexArrays(1, &VAO);
	glBindVertexArray(VAO);


	glGenBuffers(1, &EBO);
	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
	glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(unsigned) * indices.size(), &indices[0], GL_STATIC_DRAW);

	glEnableVertexAttribArray(0);//开始绑定
	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)0);
	glEnableVertexAttribArray(1);
	glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)(3 * sizeof(GL_FLOAT)));
	glEnableVertexAttribArray(2);
	glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)(6 * sizeof(GL_FLOAT)));

	glBindVertexArray(0);//解绑

}