public void drawShapes() {
gl.clear(ClearBufferMask.COLOR_BUFFER_BIT, ClearBufferMask.DEPTH_BUFFER_BIT);
MODELVIEW.push();
float[] gt = getState().translation;
if (gt != null) {
MODELVIEW.translate(gt[0], gt[1], gt[2]);
}
for (int i = 0; i < vertices.length; ++i) {
WebGLState s = getState();
MODELVIEW.push();
MODELVIEW.translate(s.shapes[i].tx, s.shapes[i].ty, s.shapes[i].tz);
MODELVIEW.rotateX(s.shapes[i].rx);
MODELVIEW.rotateY(s.shapes[i].ry);
MODELVIEW.rotateZ(s.shapes[i].rz);
setMatrixUniforms();
MODELVIEW.pop();
gl.bindBuffer(BufferTarget.ARRAY_BUFFER, vertices[i]);
gl.vertexAttribPointer(vertexPositionAttribute, 3, DataType.FLOAT, false, 0, 0);
gl.bindBuffer(BufferTarget.ARRAY_BUFFER, colors[i]);
gl.vertexAttribPointer(vertexColorAttribute, 4, DataType.FLOAT, false, 0, 0);
if (indices[i] != null) {
gl.bindBuffer(BufferTarget.ELEMENT_ARRAY_BUFFER, indices[i]);
gl.drawElements(BeginMode.TRIANGLES, 36, DrawElementsType.UNSIGNED_SHORT, 0);
} else {
gl.drawArrays(BeginMode.TRIANGLE_STRIP, 0, 3);
}
}
MODELVIEW.pop();
}
/** Initialize the WebGL buffers for our shapes. */
private void buildBuffers(Shape[] shapes) {
if (shapes != null) {
vertices = new WebGLBuffer[shapes.length];
colors = new WebGLBuffer[shapes.length];
indices = new WebGLBuffer[shapes.length];
for (int i = 0; i < shapes.length; ++i) {
vertices[i] = gl.createBuffer();
gl.bindBuffer(BufferTarget.ARRAY_BUFFER, vertices[i]);
gl.bufferData(
BufferTarget.ARRAY_BUFFER,
Float32Array.create(shapes[i].vertices),
BufferUsage.STATIC_DRAW);
gl.vertexAttribPointer(vertexPositionAttribute, 3, DataType.FLOAT, false, 0, 0);
colors[i] = gl.createBuffer();
gl.bindBuffer(BufferTarget.ARRAY_BUFFER, colors[i]);
gl.bufferData(
BufferTarget.ARRAY_BUFFER,
Float32Array.create(shapes[i].colors),
BufferUsage.STATIC_DRAW);
gl.vertexAttribPointer(vertexColorAttribute, 4, DataType.FLOAT, false, 0, 0);
if (shapes[i].indexes != null) {
indices[i] = gl.createBuffer();
gl.bindBuffer(BufferTarget.ELEMENT_ARRAY_BUFFER, indices[i]);
gl.bufferData(
BufferTarget.ELEMENT_ARRAY_BUFFER,
Uint16Array.create(shapes[i].indexes),
BufferUsage.STATIC_DRAW);
}
}
} else {
Window.alert("No shapes found");
}
}