MeshViewer: better double-buffering
[anneal.git] / src / edu / berkeley / qfat / MeshViewer.java
index c6318a4..2fe4200 100644 (file)
@@ -8,35 +8,51 @@ import javax.media.opengl.*;
 import javax.media.opengl.glu.*;
 import com.sun.opengl.util.*;
 import java.util.*;
+import edu.berkeley.qfat.bind.*;
 import edu.berkeley.qfat.geom.*;
 import edu.berkeley.qfat.geom.Point;
 
-public class MeshViewer implements GLEventListener, MouseListener, MouseMotionListener, KeyListener, MouseWheelListener {
+/**
+ *  A basic MeshViewer displays zero or more meshes to the user, in
+ *  wireframe or shaded panels.
+ */
+public class MeshViewer extends JPanel implements GLEventListener, MouseListener, MouseMotionListener, KeyListener, MouseWheelListener {
 
-    Mesh.Vertex closest = null;
+    Main main;
 
-    private HashSet<Mesh> meshes = new HashSet<Mesh>();
-    public synchronized void addMesh(Mesh m) { meshes.add(m); }
-    public synchronized void removeMesh(Mesh m) { meshes.remove(m); }
+    private float tz = 0;
+    private float anglex = 0;
+    private float angley = 0;
 
-    private int mousex;
-    private int mousey;
-    private Matrix projection = null;
-    private Point clickPoint = null;
+    boolean drawEdge = false;
 
-    GLCanvas glcanvas;
+    private Mesh.Vertex closest = null;
+    private Mesh.E      closestEdge = null;
+    private Point       closestOriginallyAt = null;
+    private int         mousex;
+    private int         mousey;
+    private Matrix      projection = null;
+    private Point       clickPoint = null;
+    private GLCanvas    glcanvas;
+    private boolean     updateVisibilities = false;
+    private boolean     updateClosest = false;
+    private boolean     mouseInside = false;
 
-    Point clickClosest = null;
+    private HashSet<Mesh> meshes = new HashSet<Mesh>();
 
-    float tz = 0;
-    float anglex = 0;
-    float angley = 0;
+    public synchronized void addMesh(Mesh m) { meshes.add(m); }
+    public synchronized void removeMesh(Mesh m) { meshes.remove(m); }
 
     public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) { }
     public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged) { }
 
+    public void addKeyListener(KeyListener kl) { glcanvas.addKeyListener(kl); }
+
     public synchronized void init(GLAutoDrawable gld) {
-        GL gl = gld.getGL();
+        GL gl = glcanvas.getGL();//gld.getGL();
+
+        gl.glEnable(gl.GL_DOUBLEBUFFER);
+
         gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
         gl.glViewport(0, 0, 500, 300);
         gl.glEnable(GL.GL_DEPTH_TEST);
@@ -49,10 +65,6 @@ public class MeshViewer implements GLEventListener, MouseListener, MouseMotionLi
         float mat_specular[] = { 0.5f, 0.5f, 0.5f, 0.5f };
         float mat_shininess[] = { 50.0f };
         gl.glShadeModel(GL.GL_SMOOTH);
-        //gl.glMaterialfv(GL.GL_FRONT, GL.GL_DIFFUSE, mat_specular, 0);
-        //gl.glMaterialfv(GL.GL_FRONT, GL.GL_SPECULAR, mat_specular, 0);  
-        //gl.glMaterialfv(GL.GL_FRONT, GL.GL_AMBIENT, new float[] { 0.3f, 0.3f, 0.3f, 0.3f }, 0);  
-        //gl.glMaterialfv(GL.GL_FRONT, GL.GL_SHININESS, mat_shininess, 0);
         gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, new float[] { 1.0f,    4.0f,  -10.0f, 0.0f }, 0);
         gl.glLightfv(GL.GL_LIGHT1, GL.GL_POSITION, new float[] { -10.0f, 10.0f,   10.0f, 0.0f }, 0);
         gl.glLightfv(GL.GL_LIGHT2, GL.GL_POSITION, new float[] { 10.0f, -10.0f,   10.0f, 0.0f }, 0);
@@ -66,13 +78,29 @@ public class MeshViewer implements GLEventListener, MouseListener, MouseMotionLi
         gl.glEnable(GL.GL_COLOR_MATERIAL);
 
         display(gld);
+
+        // hack to get around Mac OS bug
+        IntBuffer buf = ByteBuffer.allocateDirect(9*4*4).order(ByteOrder.nativeOrder()).asIntBuffer();
+        gl.glReadPixels(0,0, 1, 1, gl.GL_RGB, gl.GL_UNSIGNED_BYTE, buf);
     }
 
     public synchronized final void display(GLAutoDrawable drawable) {
-        GL gl = drawable.getGL();
-        glcanvas.setSize(glcanvas.getParent().getWidth(), glcanvas.getParent().getHeight() - 100);
+        glcanvas.setSize(glcanvas.getParent().getWidth(), glcanvas.getParent().getHeight());
 
+        GL gl = glcanvas.getGL();//drawable.getGL();
         GLU glu = new GLU();
+        gl.glDrawBuffer(GL.GL_BACK);
+
+        if (updateVisibilities) {
+            updateVisibilities = false;
+            // update vertex visibilities
+            updateVisibility(gl);
+        }
+        gl.glDrawBuffer(GL.GL_BACK);
+
+        if (!mouseInside) gl.glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
+        else gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+
         gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
         gl.glPointSize(5.0f);
         gl.glLoadIdentity();
@@ -82,47 +110,131 @@ public class MeshViewer implements GLEventListener, MouseListener, MouseMotionLi
         gl.glRotatef(anglex/3, 0, 1, 0);
         gl.glRotatef(-(angley/3), 1, 0, 0);
 
-        for(Mesh mesh : meshes)
+        gl.glEnable(GL.GL_LIGHTING);
+        gl.glShadeModel(GL.GL_SMOOTH);
+        for(Mesh mesh : meshes) {
             mesh.render(gl, Matrix.ONE);
+            if (main != null && main.whichNeighbor>0 && main.transforms!=null && !mesh.option_wireframe) {
+                mesh.option_wireframe = true;
+                mesh.render(gl, main.transforms[main.whichNeighbor-1]);
+                mesh.option_wireframe = false;
+            }
+        }
 
         // highlight the point closest to the mouse; we do this here to avoid flicker
-        gl.glDisable(GL.GL_LIGHTING);
-        gl.glShadeModel(GL.GL_FLAT);
         if (closest != null) {
-            gl.glColor3f(1,1,1);
-            gl.glBegin(gl.GL_POINTS);
-            closest.getPoint().glVertex(gl);
-            gl.glEnd();
-        }
-
-        // update vertex visibilities
-        // FIXME: only do this when we switch into vertex-finding mode
-        updateVisibility(gl);
+            gl.glDisable(GL.GL_LIGHTING);
+            gl.glShadeModel(GL.GL_FLAT);
+
+            if (drawEdge) {
+                for(Mesh.E e : (Iterable<Mesh.E>)closestEdge.getBoundPeers()) {
+                    gl.glColor3f(0,1,0);
+                    gl.glBegin(gl.GL_LINES);
+                    e.glVertices(gl);
+                    gl.glEnd();
+                    gl.glColor3f(1,0,0);
+                    gl.glBegin(gl.GL_LINES);
+                    e.pair.glVertices(gl);
+                    gl.glEnd();
+                }
+                /*
+                if (closestEdge != null) {
+                    gl.glColor3f(1,1,0);
+                    gl.glBegin(gl.GL_TRIANGLES);
+                    Mesh.T t = closestEdge.t;
+                    t.p1().glVertex(gl);
+                    t.p2().glVertex(gl);
+                    t.p3().glVertex(gl);
+                    gl.glColor3f(0,1,1);
+                    main.transforms[main.whichNeighbor-1].times(closestEdge.t.p1()).glVertex(gl);
+                    main.transforms[main.whichNeighbor-1].times(closestEdge.t.p2()).glVertex(gl);
+                    main.transforms[main.whichNeighbor-1].times(closestEdge.t.p3()).glVertex(gl);
+                    System.out.println("t="
+                                       +t.p1()+"\n  "
+                                       +t.p2()+"\n  "
+                                       +t.p3()+"\n  "
+                                       );
+                    System.out.println("x="
+                                       +main.transforms[main.whichNeighbor-1].times(t.p1())+"\n  "
+                                       +main.transforms[main.whichNeighbor-1].times(t.p2())+"\n  "
+                                       +main.transforms[main.whichNeighbor-1].times(t.p3())+"\n  "
+                                       );
+                    gl.glEnd();
+                }
+                */
+            }
 
-        Matrix projection = Matrix.getProjectionMatrix(gl);
-        double dist = Double.MAX_VALUE;
-        if (getMouseClick() != null) return;
-        closest = null;
-        for(Mesh mesh : meshes)
-            if (mesh.option_selectable)
-                for(Mesh.Vertex v : mesh.vertices()) {
-                    if (!v.visible) continue;
-                    Point p = projection.times(v.getPoint());
-                    int x = (int)p.x;
-                    int y = (int)p.y;
-                    int mousex = (int)getMouse().x;
-                    int mousey = (int)getMouse().y;
-                    if (closest==null || (x-mousex)*(x-mousex)+(y-mousey)*(y-mousey) < dist) {
-                        dist = (x-mousex)*(x-mousex)+(y-mousey)*(y-mousey);
-                        closest = v;
-                    }
+            if (closest.visible) {
+                gl.glDisable(GL.GL_DEPTH_TEST);
+                gl.glColor3f(1,1,0);
+                gl.glBegin(gl.GL_POINTS);
+                closest.getPoint().glVertex(gl);
+                gl.glColor3f(0.5f,0.5f,0);
+                for(Mesh.Vertex v : (Iterable<Mesh.Vertex>)closest.getBoundPeers())
+                    if (v!=closest)
+                        v.getPoint().glVertex(gl);
+                gl.glEnd();
+
+                if (closest.getBindingConstraint() instanceof Plane) {
+                    Plane p = (Plane)closest.getBindingConstraint();
+                    Vec v = p.norm();
+                    gl.glEnable(gl.GL_BLEND);
+                    gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA);
+                    gl.glColor4f(1,1,0,0.3f);
+                    gl.glBegin(gl.GL_LINES);
+                    closest.getPoint().glVertex(gl);
+                    v.plus(closest.getPoint()).glVertex(gl);
+                    closest.getPoint().glVertex(gl);
+                    v.times(-1).plus(closest.getPoint()).glVertex(gl);
+                    gl.glEnd();
+                    gl.glDisable(gl.GL_BLEND);
                 }
 
+                gl.glEnable(GL.GL_DEPTH_TEST);
+            }
+        }
+
         projection = Matrix.getProjectionMatrix(gl);
+
+        if (updateClosest) {
+            updateClosest = false;
+            double dist = Double.MAX_VALUE;
+            double distE = Double.MAX_VALUE;
+            closest = null;
+            closestOriginallyAt = null;
+            closestEdge = null;
+            for(Mesh mesh : meshes)
+                if (mesh.option_selectable)
+                    for(Mesh.Vertex v : mesh.vertices()) {
+                        if (!v.visible) continue;
+                        Point p = projection.times(v.getPoint());
+                        int x = (int)p.x;
+                        int y = (int)p.y;
+                        int mousex = (int)getMouse().x;
+                        int mousey = (int)getMouse().y;
+                        if (closest==null || (x-mousex)*(x-mousex)+(y-mousey)*(y-mousey) < dist) {
+                            dist = (x-mousex)*(x-mousex)+(y-mousey)*(y-mousey);
+                            closest = v;
+                        }
+                        for(Mesh.E e = v.e; e!=null; e=e.pair.next==v.e?null:e.pair.next) {
+                            if (!e.v2.visible) continue;
+                            Segment s =
+                                new Segment(projection.times(e.v1.getPoint()),
+                                            projection.times(e.v2.getPoint()));
+                            double dist2 = s.distance(getMouse());
+                            if (dist2 < distE) {
+                                distE = dist2;
+                                closestEdge = e;
+                            }
+                        }
+                    }
+        }
+        gl.glFlush();
+        glcanvas.setAutoSwapBufferMode(false);
+        glcanvas.swapBuffers();
     }
 
     protected synchronized void updateVisibility(GL gl) {
-        Matrix projection = Matrix.getProjectionMatrix(gl);
         IntBuffer buf = ByteBuffer.allocateDirect(9*4*4).order(ByteOrder.nativeOrder()).asIntBuffer();
         gl.glFlush();
         gl.glDrawBuffer(GL.GL_BACK);
@@ -131,24 +243,26 @@ public class MeshViewer implements GLEventListener, MouseListener, MouseMotionLi
         gl.glFlush();
         gl.glDisable(GL.GL_LIGHTING);
         gl.glShadeModel(GL.GL_FLAT);
-        gl.glColor3f(0,0,0);
         gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
-        for(Mesh mesh : meshes) mesh.render(gl, Matrix.ONE);
+        gl.glColor3f(0,0,0);
+        for(Mesh mesh : meshes) mesh.render(gl, Matrix.ONE, true);
         for(Mesh mesh : meshes)
             if (mesh.option_selectable)
                 for(Mesh.Vertex v : mesh.vertices()) {
                     Point p = v.getPoint();
+                    Point projected = projection.times(p);
+                    boolean vis = false;
+
                     gl.glColor3f(1,1,1);
                     gl.glBegin(gl.GL_POINTS);
                     p.glVertex(gl);
                     gl.glEnd();
                     gl.glFlush();
-                    
-                    Point projected = projection.times(p);
+
+                    vis = false;
                     gl.glReadPixels((int)projected.x-1, (int)projected.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);
@@ -181,33 +295,43 @@ public class MeshViewer implements GLEventListener, MouseListener, MouseMotionLi
     public void keyReleased(KeyEvent e) { }
 
     public void mouseClicked(MouseEvent e) { }
-    public void mouseEntered(MouseEvent e) { }
-    public void mouseExited(MouseEvent e) { }
+    public void mouseEntered(MouseEvent e) { mouseInside = true; }
+    public void mouseExited(MouseEvent e) { mouseInside = false; }
     public void mousePressed(MouseEvent e) {
         clickPoint = getMouse();
-        clickClosest = closest == null ? null : closest.getPoint();
     }
 
     public void mouseReleased(MouseEvent e) {
         clickPoint = null;
-        clickClosest = null;
     }
 
     public void mouseMoved(MouseEvent e) {
         mousex = e.getX();
         mousey = e.getY();
+
+        if ((e.getModifiersEx() & MouseEvent.SHIFT_DOWN_MASK) != 0) {
+            updateVisibilities = true;
+            drawEdge = true;
+            updateClosest = true;
+        }
     }
 
     public void mouseDragged(MouseEvent e) {
         if ((e.getModifiersEx() & MouseEvent.SHIFT_DOWN_MASK) != 0) {
-            if (closest != null && projection != null && clickClosest != null) {
+            updateVisibilities = true;
+            drawEdge = true;
+            if (closest != null && projection != null) {
                 synchronized(this) {
+                    if (closestOriginallyAt==null) closestOriginallyAt = closest.getPoint();
                     Vec d1 = projection.inverse().times(getMouse()).minus(projection.inverse().times(clickPoint));
-                    Vec delta = d1.plus(clickClosest).minus(closest.getPoint());
+                    Vec delta = d1.plus(closestOriginallyAt).minus(closest.getPoint());
                     closest.move(delta, false);
                 }
             }
+        } else if ((e.getModifiersEx() & MouseEvent.CTRL_DOWN_MASK) != 0) {
+            // move edge
         } else {
+            updateVisibilities = true;
             anglex -= mousex - e.getX();
             angley += mousey - e.getY();
         }
@@ -215,10 +339,11 @@ public class MeshViewer implements GLEventListener, MouseListener, MouseMotionLi
         mousey = e.getY();
     }
 
-    public MeshViewer(JFrame f) {
+    public MeshViewer() {
         glcanvas = new GLCanvas();
         glcanvas.addGLEventListener(this);
-        f.add(glcanvas, BorderLayout.CENTER);
+        setLayout(new BorderLayout());
+        this.add(glcanvas, BorderLayout.CENTER);
         glcanvas.addMouseListener(this);
         glcanvas.addMouseMotionListener(this);
         glcanvas.addMouseWheelListener(this);
@@ -226,7 +351,7 @@ public class MeshViewer implements GLEventListener, MouseListener, MouseMotionLi
     }
 
     public void repaint() {
-        glcanvas.repaint();
+        if (glcanvas != null) glcanvas.repaint();
     }
 
 }
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