/**
* Creates vertex buffer objects to render this skybox.
*
* @param gl OpenGL interface
*/
private void createVBO(GL gl) {
FloatBuffer vertexBuffer =
BufferUtil.newFloatBuffer(324); // 36 faces, 3 vertices per face, 3 co-ordinates per vertex
FloatBuffer textureBuffer =
BufferUtil.newFloatBuffer(216); // 36 faces, 3 vertices per face, 2 co-ordinates per vertex
nVertices = populateVBOWithVertices(vertexBuffer);
vertexBuffer.flip();
populateVBOWithTextureCoords(textureBuffer);
textureBuffer.flip();
gl.glGenBuffersARB(2, VBOIds, 0);
// Load buffer into graphics card memory
// Vertex coordinates
gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, VBOIds[0]); // Bind The Buffer
gl.glBufferDataARB(
GL.GL_ARRAY_BUFFER_ARB,
nVertices * 3 * BufferUtil.SIZEOF_FLOAT,
vertexBuffer,
GL.GL_STATIC_DRAW_ARB);
gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, VBOIds[1]);
gl.glBufferDataARB(
GL.GL_ARRAY_BUFFER_ARB,
nVertices * 2 * BufferUtil.SIZEOF_FLOAT,
textureBuffer,
GL.GL_STATIC_DRAW_ARB);
vertexBuffer = null;
textureBuffer = null;
}
private void buildLeavesVBO(GL gl) {
// Allocate buffer memory
FloatBuffer leafVertexBuffer = BufferUtil.newFloatBuffer(81 * 6 * 3);
FloatBuffer leafTextureBuffer = BufferUtil.newFloatBuffer(81 * 6 * 2);
nLeafVertices = tree.createLeavesVBO(leafVertexBuffer, leafTextureBuffer);
leafVertexBuffer.flip();
leafTextureBuffer.flip();
// Create VBO Id
if (branchVBOIds[0] != 0) {
gl.glDeleteBuffersARB(2, leafVBOIds, 0);
}
gl.glGenBuffersARB(2, leafVBOIds, 0); // Get Valid Names
// Load buffer into graphics card memory
// Vertex coordinates
gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, leafVBOIds[0]); // Bind The Buffer
gl.glBufferDataARB(
GL.GL_ARRAY_BUFFER_ARB,
nLeafVertices * 3 * BufferUtil.SIZEOF_FLOAT,
leafVertexBuffer,
GL.GL_STATIC_DRAW_ARB);
gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, leafVBOIds[1]);
gl.glBufferDataARB(
GL.GL_ARRAY_BUFFER_ARB,
nLeafVertices * 2 * BufferUtil.SIZEOF_FLOAT,
leafTextureBuffer,
GL.GL_STATIC_DRAW_ARB);
leafVertexBuffer = null;
leafTextureBuffer = null;
}
public static int createGLResource(int type, int param) {
int id = 0;
if (type == GL_TEXTURE_OBJECT) {
int[] temp = new int[1];
gl.glGenTextures(1, temp, 0);
id = temp[0];
glTextureObjects.add(id);
} else if (type == GL_VERTEX_BUFFER) {
int[] temp = new int[1];
gl.glGenBuffersARB(1, temp, 0);
id = temp[0];
glVertexBuffers.add(id);
} else if (type == GL_FRAME_BUFFER) {
int[] temp = new int[1];
gl.glGenFramebuffersEXT(1, temp, 0);
id = temp[0];
glFrameBuffers.add(id);
} else if (type == GL_RENDER_BUFFER) {
int[] temp = new int[1];
gl.glGenRenderbuffersEXT(1, temp, 0);
id = temp[0];
glRenderBuffers.add(id);
} else if (type == GLSL_PROGRAM) {
id = gl.glCreateProgram();
glslPrograms.add(id);
} else if (type == GLSL_SHADER) {
id = gl.glCreateShader(param);
glslShaders.add(id);
}
return id;
}
private void buildFruitVBO(GL gl) {
// Allocate buffer memory
FloatBuffer vertexBuffer =
BufferUtil.newFloatBuffer(
40 * 36 * 3); // 40 fruits, 36 vertices per fruit, 3 coordinates per vertex
FloatBuffer normalBuffer = BufferUtil.newFloatBuffer(40 * 36 * 3);
FloatBuffer textureCoordBuffer = BufferUtil.newFloatBuffer(40 * 36 * 2);
// FloatBuffer attributeBuffer = BufferUtil.newFloatBuffer(40 * 36 * 4);
// FloatBuffer baseCenterBuffer = BufferUtil.newFloatBuffer(40 * 36 * 3);
// FloatBuffer transformationRow1Buffer = BufferUtil.newFloatBuffer(40 * 36 * 4);
// FloatBuffer transformationRow2Buffer = BufferUtil.newFloatBuffer(40 * 36 * 4);
// FloatBuffer transformationRow3Buffer = BufferUtil.newFloatBuffer(40 * 36 * 4);
// FloatBuffer transformationRow4Buffer = BufferUtil.newFloatBuffer(40 * 36 * 4);
nFruitVertices = tree.createFruitVBO(vertexBuffer, normalBuffer, textureCoordBuffer);
// attributeBuffer, baseCenterBuffer, transformationRow1Buffer, transformationRow2Buffer,
// transformationRow3Buffer, transformationRow4Buffer);
vertexBuffer.flip();
normalBuffer.flip();
textureCoordBuffer.flip();
// attributeBuffer.flip();
// baseCenterBuffer.flip();
// transformationRow1Buffer.flip();
// transformationRow2Buffer.flip();
// transformationRow3Buffer.flip();
// transformationRow4Buffer.flip();
// Create VBO Id
gl.glGenBuffersARB(1, fruitVBOIds, 0); // Get Valid Names
// Load buffer into graphics card memory
// Vertex coordinates
gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, fruitVBOIds[0]); // Bind The Buffer
gl.glBufferDataARB(
GL.GL_ARRAY_BUFFER_ARB,
nFruitVertices * 3 * BufferUtil.SIZEOF_FLOAT,
vertexBuffer,
GL.GL_DYNAMIC_DRAW_ARB);
// //Vertex attributes
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, fruitVBOIds[1]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nFruitVertices * 4 *
// BufferUtil.SIZEOF_FLOAT, attributeBuffer, GL.GL_DYNAMIC_DRAW_ARB);
//
// //branch base centers
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, fruitVBOIds[2]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nFruitVertices * 3 *
// BufferUtil.SIZEOF_FLOAT, baseCenterBuffer, GL.GL_DYNAMIC_DRAW_ARB);
//
// //branch transformations
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, fruitVBOIds[3]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nFruitVertices * 4 *
// BufferUtil.SIZEOF_FLOAT, transformationRow1Buffer, GL.GL_STATIC_DRAW_ARB);
//
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, fruitVBOIds[4]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nFruitVertices * 4 *
// BufferUtil.SIZEOF_FLOAT, transformationRow2Buffer, GL.GL_STATIC_DRAW_ARB);
//
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, fruitVBOIds[5]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nFruitVertices * 4 *
// BufferUtil.SIZEOF_FLOAT, transformationRow3Buffer, GL.GL_STATIC_DRAW_ARB);
//
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, fruitVBOIds[6]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nFruitVertices * 4 *
// BufferUtil.SIZEOF_FLOAT, transformationRow4Buffer, GL.GL_DYNAMIC_DRAW_ARB);
// Our Copy Of The Data Is No Longer Necessary, It Is Safe In The Graphics Card
vertexBuffer = null;
textureCoordBuffer = null;
// attributeBuffer = null;
// baseCenterBuffer = null;
// transformationRow1Buffer = null;
// transformationRow2Buffer = null;
// transformationRow3Buffer = null;
// transformationRow4Buffer = null;
}
private void buildBranchVBO(GL gl) {
// Allocate buffer memory
FloatBuffer branchVertices =
BufferUtil.newFloatBuffer(
40 * 24 * 3); // 40 branches, 24 vertices per branch, 3 coordinates per vertex
FloatBuffer normalBuffer = BufferUtil.newFloatBuffer(40 * 24 * 3);
FloatBuffer textureCoordBuffer = BufferUtil.newFloatBuffer(40 * 24 * 2);
// FloatBuffer branchAttributes = BufferUtil.newFloatBuffer(40 * 24 * 4);
// FloatBuffer branchBaseCenters = BufferUtil.newFloatBuffer(40 * 24 * 3);
// FloatBuffer branchTransformationsRow1 = BufferUtil.newFloatBuffer(40 * 24 * 4);
// FloatBuffer branchTransformationsRow2 = BufferUtil.newFloatBuffer(40 * 24 * 4);
// FloatBuffer branchTransformationsRow3 = BufferUtil.newFloatBuffer(40 * 24 * 4);
// FloatBuffer branchTransformationsRow4 = BufferUtil.newFloatBuffer(40 * 24 * 4);
// FloatBuffer colorBuffer = BufferUtil.newFloatBuffer(40 * 24 * 4);
if (tree.needsGeometryCreation()) {
// Create the tree - creates child branches and leaves and adds vertices to the buffer
nBranchVertices = tree.create(branchVertices, normalBuffer, textureCoordBuffer);
// branchAttributes, branchBaseCenters, branchTransformationsRow1,
// branchTransformationsRow2, branchTransformationsRow3, branchTransformationsRow4);
} else { // hasFreshlyGrown returns true here
// Grow the tree - updates bounding box of each branch and adds vertices to the buffer
// System.out.println("Calling trunk.grow()");
nBranchVertices = tree.grow(branchVertices, normalBuffer, textureCoordBuffer);
// branchAttributes, branchBaseCenters, branchTransformationsRow1,
// branchTransformationsRow2, branchTransformationsRow3, branchTransformationsRow4);
}
branchVertices.flip();
normalBuffer.flip();
textureCoordBuffer.flip();
// branchAttributes.flip();
// branchBaseCenters.flip();
// branchTransformationsRow1.flip();
// branchTransformationsRow2.flip();
// branchTransformationsRow3.flip();
// branchTransformationsRow4.flip();
// Create VBO Id
if (branchVBOIds[0] != 0) {
gl.glDeleteBuffersARB(1, branchVBOIds, 0);
}
// System.out.println("branchVBOIds[2] = " + branchVBOIds[2]);
gl.glGenBuffersARB(1, branchVBOIds, 0); // Get Valid Names
// Load buffer into graphics card memory
// Vertex coordinates
gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, branchVBOIds[0]); // Bind The Buffer
gl.glBufferDataARB(
GL.GL_ARRAY_BUFFER_ARB,
nBranchVertices * 3 * BufferUtil.SIZEOF_FLOAT,
branchVertices,
GL.GL_STATIC_DRAW_ARB);
// //Vertex attributes
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, branchVBOIds[1]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nBranchVertices * 4 *
// BufferUtil.SIZEOF_FLOAT, branchAttributes, GL.GL_STATIC_DRAW_ARB);
//
// //branch base centers
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, branchVBOIds[2]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nBranchVertices * 3 *
// BufferUtil.SIZEOF_FLOAT, branchBaseCenters, GL.GL_STATIC_DRAW_ARB);
//
// //branch transformations
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, branchVBOIds[3]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nBranchVertices * 4 *
// BufferUtil.SIZEOF_FLOAT, branchTransformationsRow1, GL.GL_STATIC_DRAW_ARB);
//
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, branchVBOIds[4]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nBranchVertices * 4 *
// BufferUtil.SIZEOF_FLOAT, branchTransformationsRow2, GL.GL_STATIC_DRAW_ARB);
//
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, branchVBOIds[5]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nBranchVertices * 4 *
// BufferUtil.SIZEOF_FLOAT, branchTransformationsRow3, GL.GL_STATIC_DRAW_ARB);
//
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, branchVBOIds[6]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nBranchVertices * 4 *
// BufferUtil.SIZEOF_FLOAT, branchTransformationsRow4, GL.GL_STATIC_DRAW_ARB);
// Our Copy Of The Data Is No Longer Necessary, It Is Safe In The Graphics Card
branchVertices = null;
textureCoordBuffer = null;
// branchAttributes = null;
// branchBaseCenters = null;
// branchTransformationsRow1 = null;
// branchTransformationsRow2 = null;
// branchTransformationsRow3 = null;
// branchTransformationsRow4 = null;
// colorBuffer = null;
}
private void buildHeapVBO(GL gl) {
// Allocate buffer memory
FloatBuffer branchVertices =
BufferUtil.newFloatBuffer(
24 * 3); // 1 bounding box of heap, 24 vertices of the box, 3 coordinates per vertex
FloatBuffer textureCoordBuffer = BufferUtil.newFloatBuffer(24 * 3);
// FloatBuffer branchAttributes = BufferUtil.newFloatBuffer(24 * 4);
// FloatBuffer branchBaseCenters = BufferUtil.newFloatBuffer(24 * 3);
// FloatBuffer branchTransformationsRow1 = BufferUtil.newFloatBuffer(24 * 4);
// FloatBuffer branchTransformationsRow2 = BufferUtil.newFloatBuffer(24 * 4);
// FloatBuffer branchTransformationsRow3 = BufferUtil.newFloatBuffer(24 * 4);
// FloatBuffer branchTransformationsRow4 = BufferUtil.newFloatBuffer(24 * 4);
// Create bounding box for the heap
nBranchVertices = tree.createHeapBoundingBox(branchVertices, textureCoordBuffer);
// branchAttributes, branchBaseCenters, branchTransformationsRow1, branchTransformationsRow2,
// branchTransformationsRow3, branchTransformationsRow4);
branchVertices.flip();
textureCoordBuffer.flip();
// branchAttributes.flip();
// branchBaseCenters.flip();
// branchTransformationsRow1.flip();
// branchTransformationsRow2.flip();
// branchTransformationsRow3.flip();
// branchTransformationsRow4.flip();
if (branchVBOIds[0] != 0) {
gl.glDeleteBuffersARB(1, branchVBOIds, 0);
}
// Create VBO Id
gl.glGenBuffersARB(1, branchVBOIds, 0); // Get Valid Names
// Load buffer into graphics card memory
// Vertex coordinates
gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, branchVBOIds[0]); // Bind The Buffer
gl.glBufferDataARB(
GL.GL_ARRAY_BUFFER_ARB,
nBranchVertices * 3 * BufferUtil.SIZEOF_FLOAT,
branchVertices,
GL.GL_STATIC_DRAW_ARB);
// //Vertex attributes
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, branchVBOIds[1]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nBranchVertices * 4 *
// BufferUtil.SIZEOF_FLOAT, branchAttributes, GL.GL_STATIC_DRAW_ARB);
//
// //branch base centers
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, branchVBOIds[2]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nBranchVertices * 3 *
// BufferUtil.SIZEOF_FLOAT, branchBaseCenters, GL.GL_STATIC_DRAW_ARB);
//
// //branch transformations
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, branchVBOIds[3]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nBranchVertices * 4 *
// BufferUtil.SIZEOF_FLOAT, branchTransformationsRow1, GL.GL_STATIC_DRAW_ARB);
//
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, branchVBOIds[4]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nBranchVertices * 4 *
// BufferUtil.SIZEOF_FLOAT, branchTransformationsRow2, GL.GL_STATIC_DRAW_ARB);
//
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, branchVBOIds[5]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nBranchVertices * 4 *
// BufferUtil.SIZEOF_FLOAT, branchTransformationsRow3, GL.GL_STATIC_DRAW_ARB);
//
// gl.glBindBufferARB(GL.GL_ARRAY_BUFFER_ARB, branchVBOIds[6]);
// gl.glBufferDataARB(GL.GL_ARRAY_BUFFER_ARB, nBranchVertices * 4 *
// BufferUtil.SIZEOF_FLOAT, branchTransformationsRow4, GL.GL_STATIC_DRAW_ARB);
// Our Copy Of The Data Is No Longer Necessary, It Is Safe In The Graphics Card
branchVertices = null;
textureCoordBuffer = null;
// branchAttributes = null;
// branchBaseCenters = null;
// branchTransformationsRow1 = null;
// branchTransformationsRow2 = null;
// branchTransformationsRow3 = null;
// branchTransformationsRow4 = null;
}