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GL settings effecting multiple objects

Started by daerom Oct 2, 2002 at 11:02 AM 5 replies 600+ views

Original Post

Oct 2, 2002 at 11:02 AM

Ok, lets say I do a glColor3f(1, 1, 0); to make some text print out Yellow, but I don''t want it to effect anything else. How would I do that? I tried doing this, but it doesn''t even work on the text in the first place, it actually works on the next thing I render, which happends to be my skybox, wich is now tinted yellow. -Daerom

Shadow1234567890

Oct 2, 2002 at 11:08 AM

You have to set the color to what you want before you draw every object

i.e

void DrawObject1() {
glColor3f(0.0f, 1.0f, 0.0f);//sets color to green
//drawing code here
}

void DrawObject2() {
glColor3f(1.0f, 0.0f, 0.0f);//sets color to red
//drawing code here
}

daerom

Author

daerom

Oct 2, 2002 at 11:33 AM

Thanks

-Daerom

Fruny

203

Fruny

Oct 2, 2002 at 11:41 AM

daerom

Author

daerom

Oct 2, 2002 at 12:02 PM

I looked at that glPushAttrib and PopAttrib, but I am a little confused as to what mask to use... could you help me out a little

Thanks

-Daerom

Fruny

203

Fruny

Oct 2, 2002 at 12:10 PM

You probably need GL_CURRENT_BIT, which will save/restore (Blue Book p415)

- current RGBA color
- current color index
- current normal vector
- current texture coordinates
- current raster position
- GL_CURRENT_RASTER_POSITION_VALID flag
- RGBA color associated with current raster position
- color index associated with current raster position
- texture coordinates associated with current raster position
- GL_EDGE_FLAG flag

The attribute stack is guaranteed at least 16 levels.
Of course the save/restore operation MAY be expensive if a pipeline flush is needed. Think whether you really need it or if a call to glColor() is enough

daerom

Author

daerom

Oct 2, 2002 at 1:19 PM

Thanks a bunch...

-Daerom

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