@Override
public boolean gluProject(
float objX,
float objY,
float objZ,
float[] model,
int modelOffset,
float[] project,
int projectOffset,
int[] view,
int viewOffset,
float[] win,
int winOffset) {
modelb.clear();
modelb.put(model, modelOffset, 16);
projectb.clear();
projectb.put(project, projectOffset, 16);
viewb.clear();
viewb.put(view, viewOffset, 4);
winb.clear();
boolean result =
org.lwjgl.util.glu.GLU.gluProject(objX, objY, objZ, modelb, projectb, viewb, winb);
win[winOffset] = winb.get(0);
win[winOffset + 1] = winb.get(1);
win[winOffset + 2] = winb.get(2);
return result;
}
public Point2D[] project(
int tube, float[] modelMatrix, float[] projectionMatrix, int[] viewport, int step) {
GLU glu = new GLU();
FloatBuffer modelbuf = BufferUtils.createFloatBuffer(16);
modelbuf.put(modelMatrix);
modelbuf.rewind();
FloatBuffer projbuf = BufferUtils.createFloatBuffer(16);
projbuf.put(projectionMatrix);
projbuf.rewind();
IntBuffer viewportbuf = BufferUtils.createIntBuffer(4);
viewportbuf.put(viewport);
viewportbuf.rewind();
Point2D[] projectedSegments =
new Point2D[(int) Math.ceil(tubes[tube].segments.length / (double) step)];
int cnt = 0;
for (int j = 0; j < tubes[tube].segments.length; j = j + step) {
FloatBuffer result = BufferUtils.createFloatBuffer(3);
glu.gluProject(
tubes[tube].segments[j].x,
tubes[tube].segments[j].y,
tubes[tube].segments[j].z,
modelbuf,
projbuf,
viewportbuf,
result);
Point2D p = new Point2D.Double(result.get(0), viewport[3] - result.get(1) - 1);
projectedSegments[cnt++] = p;
}
return projectedSegments;
}