checkpoint

[anneal.git] / src / edu / berkeley / qfat / Viewer.java

diff --git a/src/edu/berkeley/qfat/Viewer.java b/src/edu/berkeley/qfat/Viewer.java
index b39f2a6..b879650 100644 (file)
--- a/src/edu/berkeley/qfat/Viewer.java
+++ b/src/edu/berkeley/qfat/Viewer.java
@@ -73,12 +73,59 @@ public abstract class Viewer implements GLEventListener, MouseListener, MouseMot
     }
 
     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);