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package net.tylermurphy.Minecraft.Render.Data;
import org.lwjgl.BufferUtils;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL15;
import org.lwjgl.opengl.GL20;
import org.lwjgl.opengl.GL30;
import java.io.Serializable;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.util.ArrayList;
import java.util.List;
public class Mesh implements Serializable {
private static final long serialVersionUID = -8137846451745511907L;
public static List<Integer> vaos = new ArrayList<>();
public static List<Integer> vbos = new ArrayList<>();
private final int id;
private final int vertexCount;
private int counter = 0;
public Mesh(int vertexCount){
this.id = GL30.glGenVertexArrays();
vaos.add(id);
this.vertexCount = vertexCount;
GL30.glBindVertexArray(id);
}
public Mesh store(float[] data, int coordinateSize){
int id = GL15.glGenBuffers();
vbos.add(id);
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, id);
FloatBuffer buffer = BufferUtils.createFloatBuffer(data.length);
buffer.put(data);
buffer.flip();
GL15.glBufferData(GL15.GL_ARRAY_BUFFER, buffer, GL15.GL_STATIC_DRAW);
GL20.glVertexAttribPointer(counter,coordinateSize, GL11.GL_FLOAT,false,0,0);
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
counter++;
return this;
}
public Mesh finish(){
GL30.glBindVertexArray(0);
return this;
}
public void delete(){
IntBuffer amount = BufferUtils.createIntBuffer(1);
GL20.glGetIntegerv(GL20.GL_MAX_VERTEX_ATTRIBS, amount);
GL30.glBindVertexArray(id);
for (int i=0; i < amount.get(0); i++) {
IntBuffer vbo = BufferUtils.createIntBuffer(1);
GL20.glGetVertexAttribiv(i, GL20.GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING, vbo);
if(vbo.get(0) > 0) {
GL15.glDeleteBuffers(vbo.get(0));
}
}
GL30.glDeleteVertexArrays(id);
}
public int getID() {
return id;
}
public int getVertexCount() {
return vertexCount;
}
public static void cleanUp() {
for(int vao:vaos){
GL30.glDeleteVertexArrays(vao);
}
for(int vbo:vbos){
GL30.glDeleteBuffers(vbo);
}
}
}
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