Update of /cvsroot/bprocessor/gl/src/net/sourceforge/bprocessor/gl/view
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv32739
Modified Files:
AbstractView.java
Log Message:
added method to determine surface orientation compared to the camera
Index: AbstractView.java
===================================================================
RCS file: /cvsroot/bprocessor/gl/src/net/sourceforge/bprocessor/gl/view/AbstractView.java,v
retrieving revision 1.46
retrieving revision 1.47
diff -C2 -d -r1.46 -r1.47
*** AbstractView.java 27 Oct 2005 15:05:10 -0000 1.46
--- AbstractView.java 28 Oct 2005 12:18:38 -0000 1.47
***************
*** 201,205 ****
AbstractView.aspect = AbstractView.width / AbstractView.height;
!
gl.glClearColor(0.7f, 0.7f, 0.7f, 0.0f);
gl.glViewport(0, 0, (int)width, (int)height);
--- 201,205 ----
AbstractView.aspect = AbstractView.width / AbstractView.height;
!
gl.glClearColor(0.7f, 0.7f, 0.7f, 0.0f);
gl.glViewport(0, 0, (int)width, (int)height);
***************
*** 395,402 ****
*/
void labelSurface(Surface surface, boolean clickable) {
- Vertex from = surface.center();
- Vertex n = surface.normal();
- n.scale(1 / n.length());
Transformation transformation = transformation();
Domain frontDomain = surface.getFrontDomain();
Domain backDomain = surface.getBackDomain();
--- 395,401 ----
*/
void labelSurface(Surface surface, boolean clickable) {
Transformation transformation = transformation();
+ Vertex from = surface.center();
+ Vertex front = transformation.project(from);
Domain frontDomain = surface.getFrontDomain();
Domain backDomain = surface.getBackDomain();
***************
*** 419,433 ****
int backWidth = glut.glutBitmapLength(GLUT.BITMAP_HELVETICA_18, backName);
- Vertex front = transformation.project(from);
Vertex frontTextAnchor;
Vertex backTextAnchor;
!
!
! Vertex near = new Vertex("", front.getX(), front.getY(), 0.0);
! Vertex far = new Vertex("", front.getX(), front.getY(), 1.0);
! Edge ray = new Edge("", near, far);
! ray = transformation.unProject(ray);
! Vertex rayDir = ray.getTo().minus(ray.getFrom());
! if (rayDir.dot(n) > 0) {
frontTextAnchor = new Vertex("", front.getX() - (frontWidth / 2),
front.getY() - 17, front.getZ());
--- 418,425 ----
int backWidth = glut.glutBitmapLength(GLUT.BITMAP_HELVETICA_18, backName);
Vertex frontTextAnchor;
Vertex backTextAnchor;
!
! if (!facingFront(surface)) {
frontTextAnchor = new Vertex("", front.getX() - (frontWidth / 2),
front.getY() - 17, front.getZ());
***************
*** 1213,1219 ****
* @return The transformation
*/
! public Transformation transformation() {
! return null;
! }
/**
--- 1205,1209 ----
* @return The transformation
*/
! public abstract Transformation transformation();
/**
***************
*** 1240,1242 ****
--- 1230,1253 ----
return height;
}
+
+ /**
+ * Returns a boolean idicating wherther or not we are facing
+ * the front of the surface.
+ * @param surface the surface
+ * @return the boolean
+ */
+ public boolean facingFront(Surface surface) {
+ Vertex normal = surface.normal();
+ Transformation transformation = transformation();
+ Vertex center = transformation.project(surface.center());
+ Vertex from = new Vertex("", center.getX(), center.getY(), 0.0);
+ Vertex to = new Vertex("", center.getX(), center.getY(), 1.0);
+ Edge ray = new Edge("", from, to);
+ Vertex rayDir;
+
+ ray = transformation.unProject(ray);
+ rayDir = ray.getTo().minus(ray.getFrom());
+ normal.scale(1 / normal.length());
+ return rayDir.dot(normal) < 0;
+ }
}
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