69 lines
2.1 KiB
Java
69 lines
2.1 KiB
Java
|
package com.gnarly.engine.model;
|
||
|
|
|
||
|
|
import static org.lwjgl.opengl.GL11.GL_FLOAT;
|
||
|
|
import static org.lwjgl.opengl.GL11.GL_TRIANGLES;
|
||
|
|
import static org.lwjgl.opengl.GL11.GL_UNSIGNED_INT;
|
||
|
|
import static org.lwjgl.opengl.GL11.glDrawElements;
|
||
|
|
import static org.lwjgl.opengl.GL15.GL_ARRAY_BUFFER;
|
||
|
|
import static org.lwjgl.opengl.GL15.GL_ELEMENT_ARRAY_BUFFER;
|
||
|
|
import static org.lwjgl.opengl.GL15.GL_STATIC_DRAW;
|
||
|
|
import static org.lwjgl.opengl.GL15.glBindBuffer;
|
||
|
|
import static org.lwjgl.opengl.GL15.glBufferData;
|
||
|
|
import static org.lwjgl.opengl.GL15.glDeleteBuffers;
|
||
|
|
import static org.lwjgl.opengl.GL15.glGenBuffers;
|
||
|
|
import static org.lwjgl.opengl.GL20.glDisableVertexAttribArray;
|
||
|
|
import static org.lwjgl.opengl.GL20.glEnableVertexAttribArray;
|
||
|
|
import static org.lwjgl.opengl.GL20.glVertexAttribPointer;
|
||
|
|
import static org.lwjgl.opengl.GL30.glBindVertexArray;
|
||
|
|
import static org.lwjgl.opengl.GL30.glDeleteVertexArrays;
|
||
|
|
import static org.lwjgl.opengl.GL30.glGenVertexArrays;
|
||
|
|
|
||
|
|
import java.util.ArrayList;
|
||
|
|
|
||
|
|
public class Vao {
|
||
|
|
|
||
|
|
private int numAttribs = 0;
|
||
|
|
|
||
|
|
private int vao, ibo, count;
|
||
|
|
|
||
|
|
private ArrayList<Integer> vbos = new ArrayList<>();
|
||
|
|
|
||
|
|
public Vao(float[] vertices, int[] indices) {
|
||
|
|
vao = glGenVertexArrays();
|
||
|
|
glBindVertexArray(vao);
|
||
|
|
addAttribute(vertices, 3);
|
||
|
|
ibo = glGenBuffers();
|
||
|
|
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
|
||
|
|
glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices, GL_STATIC_DRAW);
|
||
|
|
count = indices.length;
|
||
|
|
}
|
||
|
|
|
||
|
|
public void addAttribute(float[] data, int size) {
|
||
|
|
int vbo = glGenBuffers();
|
||
|
|
vbos.add(vbo);
|
||
|
|
glBindBuffer(GL_ARRAY_BUFFER, vbo);
|
||
|
|
glBufferData(GL_ARRAY_BUFFER, data, GL_STATIC_DRAW);
|
||
|
|
glVertexAttribPointer(numAttribs, size, GL_FLOAT, false, 0, 0);
|
||
|
|
++numAttribs;
|
||
|
|
}
|
||
|
|
|
||
|
|
public void render() {
|
||
|
|
glBindVertexArray(vao);
|
||
|
|
|
||
|
|
for (int i = 0; i < numAttribs; ++i)
|
||
|
|
glEnableVertexAttribArray(i);
|
||
|
|
|
||
|
|
glDrawElements(GL_TRIANGLES, count, GL_UNSIGNED_INT, 0);
|
||
|
|
|
||
|
|
for (int i = 0; i < numAttribs; ++i)
|
||
|
|
glDisableVertexAttribArray(i);
|
||
|
|
}
|
||
|
|
|
||
|
|
public void destroy() {
|
||
|
|
for(int vbo : vbos)
|
||
|
|
glDeleteBuffers(vbo);
|
||
|
|
glDeleteBuffers(ibo);
|
||
|
|
glDeleteVertexArrays(vao);
|
||
|
|
}
|
||
|
|
}
|