}
public abstract void _display(GLAutoDrawable drawable, GL gl);
- public void display(GLAutoDrawable drawable) {
+ public final void display(GLAutoDrawable drawable) {
GL gl = drawable.getGL();
_display(drawable, gl);
this.projection = Matrix.getProjectionMatrix(gl);
+ updateVisibility(gl, tile);
}
+ private void updateVisibility(GL gl, Mesh mesh) {
+ IntBuffer buf = ByteBuffer.allocateDirect(9*4*4).order(ByteOrder.nativeOrder()).asIntBuffer();
+ gl.glColor3f(0,0,0);
+ gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
+ double dist = Double.MAX_VALUE;
+ if (clickPoint==null) closest = null;
+ synchronized(this) {
+ for(Mesh.T t : mesh)
+ t.glTriangle(gl, null);
+ for(Mesh.Vertex v : mesh.vertices()) {
+ Point p = v.getPoint();
+ gl.glColor3f(1,1,1);
+ gl.glBegin(gl.GL_POINTS);
+ p.glVertex(gl);
+ gl.glEnd();
+ gl.glFlush();
+
+ Point projected = projection.times(p);
+ int x = (int)projected.x;
+ int y = (int)projected.y;
+ gl.glReadPixels(x-1, y-1, 3, 3, gl.GL_RGB, gl.GL_UNSIGNED_BYTE, buf);
+
+ boolean vis = false;
+ for(int j=0; j<9*4; j++) vis |= buf.get(j)!=0;
+ v.visible = vis;
+ if (vis) {
+ gl.glColor3f(0,0,0);
+ gl.glBegin(gl.GL_POINTS);
+ p.glVertex(gl);
+ gl.glEnd();
+ y = glcanvas.getHeight()-y;
+ if (clickPoint==null) {
+ if (closest==null || (x-mousex)*(x-mousex)+(y-mousey)*(y-mousey) < dist) {
+ dist = (x-mousex)*(x-mousex)+(y-mousey)*(y-mousey);
+ closest = v;
+ }
+ }
+ }
+ }
+ }
+ gl.glShadeModel(GL.GL_SMOOTH);
+ gl.glEnable(GL.GL_LIGHTING);
+ gl.glDrawBuffer(GL.GL_FRONT);
+ }
+
+
/** return the position of the mouse as a point in window-space */
public Point getMouse() {
return new Point(mousex, glcanvas.getHeight()-mousey, 0);