/*
* Copyright (C) 2013 Parallel Universe Software Co.
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package co.paralleluniverse.spaceships.render;
import com.jogamp.opengl.util.glsl.ShaderProgram;
import java.nio.DoubleBuffer;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.util.BitSet;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import javax.media.opengl.GL3;
import javax.media.opengl.GLException;
/**
*
* @author pron
*/
public class VAO {
private final ShaderProgram shader;
private final int vao;
private final Map<String, Integer> attributes = Collections.synchronizedMap(new HashMap<String, Integer>());
public VAO(GL3 gl, ShaderProgram shader) {
this.shader = shader;
int[] vao1 = new int[1];
gl.glGenVertexArrays(1, vao1, 0);
this.vao = vao1[0];
}
public void bind(GL3 gl) {
gl.glBindVertexArray(vao);
}
public void unbind(GL3 gl) {
gl.glBindVertexArray(0);
}
private int getLocation(GL3 gl, String attributeName) {
Integer index = attributes.get(attributeName);
if (index == null) {
index = gl.glGetAttribLocation(shader.program(), attributeName);
if (index < 0)
throw new GLException("Attribute " + attributeName + " not found");
attributes.put(attributeName, index);
}
return index;
}
public void setVertex(GL3 gl, String attributeName, VBO vbo) {
vbo.bind(gl);
final int location = getLocation(gl, attributeName);
gl.glEnableVertexAttribArray(location);
if (vbo.getBuffer() instanceof FloatBuffer)
gl.glVertexAttribPointer(location, vbo.getComponents(), vbo.getComponentType(), vbo.isNormalized(), vbo.getStride(), 0);
else if (vbo.getBuffer() instanceof IntBuffer)
gl.glVertexAttribIPointer(location, vbo.getComponents(), vbo.getComponentType(), vbo.getStride(), 0);
else if (vbo.getBuffer() instanceof DoubleBuffer)
gl.glVertexAttribPointer(location, vbo.getComponents(), vbo.getComponentType(), false, vbo.getStride(), 0);
else
throw new GLException("Unrecognized buffer type: " + vbo.getBuffer().getClass().getName());
}
public void destroy(GL3 gl) {
for (int i : attributes.values())
gl.glDisableVertexAttribArray(i);
gl.glBindVertexArray(0);
gl.glDeleteVertexArrays(1, new int[]{vao}, 0);
}
}