Hello all,
Using the example code at
<http://homepage.mac.com/gstahl/FileSharing6.html> I copied and pasted
the methods from the BasicOpenGLView subclass to perform these
functions(---- Image Data Creation ---- and ---- Printing and copying
---- methods) into my own NSOpenGLView subclass. I had to override the
FirstResponder methods and perform a couple of connections in IB from
the -saveDocument and -print menu items to their corresponding
FirstResponder methods.
However whenever I copy, print or save, I get a horizontal white line
artifact ended with a pink pixel in the new bitmap. I made double-sure
that I wasn't writing the artifacts into the view and I'm certain they
appear as a result of the -copy, -print or -saveDocument methods. I'm
using 10.3.9 and XCode 1.5.
See the artifacts here:
http://siddha.ca/myimages/artifacts.png
The line length is proportional to the width of the view(1/4).
I also used the same +BasicPixelFormat method and the -initWithFrame
are identical. However the resizeGL, prepareOpenGL methods are
different (it's only two-dimensional):
- (void) resizeGL
{
NSRect rectView = [self bounds];
// ensure camera knows size changed
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(rectView.origin.x,rectView.size.width,rectView.origin.y,
rectView.size.height);
glMatrixMode(GL_MODELVIEW);
glViewport((GLfloat)rectView.origin.x,
(GLfloat)rectView.origin.y,(GLfloat)rectView.size.width,
(GLfloat)rectView.size.height);
}
- (void) prepareOpenGL
{
long swapInt = 1;
[[self openGLContext] setValues:&swapInt
forParameter:NSOpenGLCPSwapInterval]; // set to vbl sync
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
}
here is my drawRect: too
- (void)drawRect:(NSRect)rect {
int i;
if (NO == fGLInit)
[self prepareOpenGL];
fGLInit = YES;
// setup viewport and prespective
[self resizeGL]; // forces projection matrix update (does test for
size changes)
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) ;
[self drawTaoVertices];
[[self openGLContext] flushBuffer];
}
I guess I'd better include how I draw the vertices:
- (void)drawTaoVertices
{
glVertexPointer(2,GL_FLOAT, 2*sizeof(GLfloat), mVertex);
glColorPointer(4,GL_FLOAT, 4*sizeof(GLfloat), mColor);
glEnableClientState(GL_COLOR_ARRAY);
glEnableClientState(GL_VERTEX_ARRAY);
glDrawArrays(GL_POINTS,0,[self vertexCount]);
glDisableClientState(GL_COLOR_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
}
Not sure where to go from here. You deserve a medal if you got to this
line :)
best regards,
Michael
On 30-Jan-05, at 8:22 PM, email@hidden wrote:
In a message dated 1/30/05 6:01:38 PM, email@hidden writes:
THANKS a bunch! Save didn't work for me [out of the box :>)] but
perhaps I can get it to work later.
Sorry, I launched your app in my web surfing user and tried to save
in a spot that had no permissions. Save DOES work. All is well!
I have changed the project to XCode 1.5 and am off & running.
Thanks again!
Bob _______________________________________________
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