public void RebuildMesh(float startX, float startY, float startZ) {
VBOColorHandle = GL15.glGenBuffers();
VBOVertexHandle = GL15.glGenBuffers();
// Using 6 * 4 * 3 because 6 faces * 4 pts per face * 3 coords per point
FloatBuffer VertexPositionData =
BufferUtils.createFloatBuffer((CHUNK_SIZE * CHUNK_SIZE * CHUNK_SIZE) * 6 * 4 * 3);
FloatBuffer VertexColorData =
BufferUtils.createFloatBuffer((CHUNK_SIZE * CHUNK_SIZE * CHUNK_SIZE) * 6 * 4 * 3);
for (float x = 0; x < CHUNK_SIZE; x += 1) {
for (float y = 0; y < CHUNK_SIZE; y += 1) {
for (float z = 0; z < CHUNK_SIZE; z += 1) {
VertexPositionData.put(
CreateCube(
(float) startX + x * CUBE_LENGTH,
(float) startY + y * CUBE_LENGTH,
(float) startZ + z * CUBE_LENGTH));
VertexColorData.put(CreateCubeVertexCol(GetCubeColor(Blocks[(int) x][(int) y][(int) z])));
}
}
}
VertexColorData.flip();
VertexPositionData.flip();
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, VBOVertexHandle);
GL15.glBufferData(GL15.GL_ARRAY_BUFFER, VertexPositionData, GL15.GL_STATIC_DRAW);
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, VBOColorHandle);
GL15.glBufferData(GL15.GL_ARRAY_BUFFER, VertexColorData, GL15.GL_STATIC_DRAW);
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
}
public void setupQuad() {
// We'll define our quad using 4 vertices of the custom 'Vertex' class
Vertex v0 = new Vertex();
v0.setXYZ(-0.5f, 0.5f, 0f);
v0.setRGB(1, 0, 0);
Vertex v1 = new Vertex();
v1.setXYZ(-0.5f, -0.5f, 0f);
v1.setRGB(0, 1, 0);
Vertex v2 = new Vertex();
v2.setXYZ(0.5f, -0.5f, 0f);
v2.setRGB(0, 0, 1);
Vertex v3 = new Vertex();
v3.setXYZ(0.5f, 0.5f, 0f);
v3.setRGB(1, 1, 1);
Vertex[] vertices = new Vertex[] {v0, v1, v2, v3};
// Put each 'Vertex' in one FloatBuffer
FloatBuffer verticesBuffer =
BufferUtils.createFloatBuffer(vertices.length * Vertex.elementCount);
for (int i = 0; i < vertices.length; i++) {
verticesBuffer.put(vertices[i].getXYZW());
verticesBuffer.put(vertices[i].getRGBA());
}
verticesBuffer.flip();
// OpenGL expects to draw vertices in counter clockwise order by default
byte[] indices = {
0, 1, 2,
2, 3, 0
};
indicesCount = indices.length;
ByteBuffer indicesBuffer = BufferUtils.createByteBuffer(indicesCount);
indicesBuffer.put(indices);
indicesBuffer.flip();
// Create a new Vertex Array Object in memory and select it (bind)
vaoId = GL30.glGenVertexArrays();
GL30.glBindVertexArray(vaoId);
// Create a new Vertex Buffer Object in memory and select it (bind)
vboId = GL15.glGenBuffers();
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, vboId);
GL15.glBufferData(GL15.GL_ARRAY_BUFFER, verticesBuffer, GL15.GL_STATIC_DRAW);
// Put the positions in attribute list 0
GL20.glVertexAttribPointer(0, 4, GL11.GL_FLOAT, false, Vertex.sizeInBytes, 0);
// Put the colors in attribute list 1
GL20.glVertexAttribPointer(
1, 4, GL11.GL_FLOAT, false, Vertex.sizeInBytes, Vertex.elementBytes * 4);
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
// Deselect (bind to 0) the VAO
GL30.glBindVertexArray(0);
// Create a new VBO for the indices and select it (bind) - INDICES
vboiId = GL15.glGenBuffers();
GL15.glBindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, vboiId);
GL15.glBufferData(GL15.GL_ELEMENT_ARRAY_BUFFER, indicesBuffer, GL15.GL_STATIC_DRAW);
GL15.glBindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, 0);
}
@Override
public void create() {
if (isCreated()) {
throw new IllegalStateException("Vertex array has already been created");
}
if (vertexData == null) {
throw new IllegalStateException("Vertex data has not been set");
}
// Generate and bind the vao
id = GL30.glGenVertexArrays();
GL30.glBindVertexArray(id);
// Generate, bind and fill the indices vbo then unbind
indicesBufferID = GL15.glGenBuffers();
GL15.glBindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, indicesBufferID);
GL15.glBufferData(
GL15.GL_ELEMENT_ARRAY_BUFFER, vertexData.getIndicesBuffer(), GL15.GL_STATIC_DRAW);
GL15.glBindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, 0);
// Save the count of indices to draw
indicesCountCache = vertexData.getIndicesCount();
resetIndicesCountAndOffset();
// Create the map for attribute index to buffer ID
attributeBufferIDs = new int[vertexData.getAttributeCount()];
// For each attribute, generate, bind and fill the vbo, then setup the attribute in the vao and
// save the buffer ID for the index
for (int i = 0; i < vertexData.getAttributeCount(); i++) {
final VertexAttribute attribute = vertexData.getAttribute(i);
final int bufferID = GL15.glGenBuffers();
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, bufferID);
GL15.glBufferData(GL15.GL_ARRAY_BUFFER, attribute.getData(), GL15.GL_STATIC_DRAW);
attributeBufferIDs[i] = bufferID;
// Three ways to interpret integer data
if (attribute.getType().isInteger() && attribute.getUploadMode() == UploadMode.KEEP_INT) {
// Directly as an int
GL30.glVertexAttribIPointer(
i, attribute.getSize(), attribute.getType().getGLConstant(), 0, 0);
} else {
// Or as a float, normalized or not
GL20.glVertexAttribPointer(
i,
attribute.getSize(),
attribute.getType().getGLConstant(),
attribute.getUploadMode().normalize(),
0,
0);
}
}
// Unbind the vbo and vao
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
GL30.glBindVertexArray(0);
// Update state
super.create();
// Check for errors
LWJGLUtil.checkForGLError();
}
private void bindIndicesBuffer(int[] indices) {
int vboID = GL15.glGenBuffers();
vbos.add(vboID);
GL15.glBindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, vboID);
IntBuffer buffer = storeDataInIntBuffer(indices);
GL15.glBufferData(GL15.GL_ELEMENT_ARRAY_BUFFER, buffer, GL15.GL_STATIC_DRAW);
}
private int createTubeVbo(int tube, Color color) {
float[] c =
new float[] {color.getBlue() / 255f, color.getGreen() / 255f, color.getRed() / 255f};
totalNumVerts[tube] = tubes[tube].indeces.length;
IntBuffer buf = BufferUtils.createIntBuffer(1);
GL15.glGenBuffers(buf);
int vbo = buf.get();
FloatBuffer data = BufferUtils.createFloatBuffer(tubes[tube].indeces.length * 9);
for (int i = 0; i < tubes[tube].indeces.length; i++) {
data.put(c);
Vector3D vertex = tubes[tube].vertices[tubes[tube].indeces[i]];
Vector3D normal = tubes[tube].normals[tubes[tube].indeces[i]];
float[] vertexf = new float[] {vertex.x, vertex.y, vertex.z};
float[] normalf = new float[] {normal.x, normal.y, normal.z};
data.put(vertexf);
data.put(normalf);
}
data.rewind();
int bytesPerFloat = Float.SIZE / Byte.SIZE;
int numBytes = data.capacity() * bytesPerFloat;
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, vbo);
GL15.glBufferData(GL15.GL_ARRAY_BUFFER, data, GL15.GL_STATIC_DRAW);
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
return vbo;
}
private void storeDataInAttributeList(int attributeNumber, int attributeSize, float[] data) {
int vboID = GL15.glGenBuffers();
vbos.add(vboID);
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, vboID);
FloatBuffer buffer = storeDataInFloatBuffer(data);
GL15.glBufferData(GL15.GL_ARRAY_BUFFER, buffer, GL15.GL_STATIC_DRAW);
GL20.glVertexAttribPointer(attributeNumber, attributeSize, GL11.GL_FLOAT, false, 0, 0);
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
}
public void setupVIBO() {
ByteBuffer indexBuffer = BufferUtils.createByteBuffer(indexElementCount * getNumObjects());
for (int i = 0; i < getNumObjects(); ++i) {
indexBuffer.put(Rectangle.getOrder(4 * i));
}
indexBuffer.flip();
setVIBO(GL15.glGenBuffers());
GL15.glBindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, getVIBO());
GL15.glBufferData(GL15.GL_ELEMENT_ARRAY_BUFFER, indexBuffer, GL15.GL_DYNAMIC_DRAW);
GL15.glBindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, 0);
}
public void glGenBuffers(int n, IntBuffer buffers) {
GL15.glGenBuffers(buffers);
}
public void setupVBO() {
setVBO(GL15.glGenBuffers());
}
