void eSprite::render()
{
// SETUP AN ORTHO SCREEN FOR RENDERING
glMatrixMode(GL_PROJECTION); //Select the projection matrix
glPushMatrix(); //Store the projection matrix
glLoadIdentity(); //Reset the projection matrix
glOrtho(0,800,0,600,-1,1); //Set up an ortho screen
glBindTexture(GL_TEXTURE_2D, image.ID);
glBegin(GL_QUADS); // Start Drawing Our Quads
glTexCoord2i(1,0); glVertex2i(x,y); // Bottom Left
glTexCoord2i(1,1); glVertex2i(x,y+h); // Bottom Right
glTexCoord2i(0,1); glVertex2i(x+w,y+h); // Top Right
glTexCoord2i(0,0); glVertex2i(x+w,y); // Top Left
glEnd();
// DESTROY THE ORTHO SCREEN
glMatrixMode(GL_PROJECTION); //Select the projection matrix
glPopMatrix(); //Restore the old projection matrix
glMatrixMode(GL_MODELVIEW); //Select the modelview matrix
}
Texture Mapping Question! ARGH
Author
i cant seem to figure out why this isnt working its for my sprite class for an engine im writing.
Your answer to the flipping problem is glRotatef() 180 degrees
"I''ve sparred with creatures from the nine hells themselves... I barely plan on breaking a sweat here, today."~Drizzt Do''Urden
"I''ve sparred with creatures from the nine hells themselves... I barely plan on breaking a sweat here, today."~Drizzt Do''Urden
actually i dont think the answer is glRotatef() 180. WHen you map your coords you have a slight error i think. It should be this:
glBegin(GL_QUADS);
// Start Drawing Our Quads
glTexCoord2i(0,0); glVertex2i(x,y);
glTexCoord2i(1,1); glVertex2i(x+w,y+h);
glTexCoord2i(0,1); glVertex2i(x,y+h);
glTexCoord2i(1,0); glVertex2i(x+w,y);
glEnd();
try that
Edited by - taybrin on September 5, 2001 8:14:25 PM
glBegin(GL_QUADS);
// Start Drawing Our Quads
glTexCoord2i(0,0); glVertex2i(x,y);
glTexCoord2i(1,1); glVertex2i(x+w,y+h);
glTexCoord2i(0,1); glVertex2i(x,y+h);
glTexCoord2i(1,0); glVertex2i(x+w,y);
glEnd();
try that
Edited by - taybrin on September 5, 2001 8:14:25 PM
Uhh... not for QUADS. You''re drawing corner to corner with the above code...
Keep the vertices in the same order, but invert the "s" coordinates. Where you''ve currently got a 0, put a 1, where it''s 1, put a 0...
...(0,0) ...(x,y)
...(0,1) ...(x,y+h)
...(1,1) ...(x+w, y+h)
...(1,0) ...(x+w, y)
Keep the vertices in the same order, but invert the "s" coordinates. Where you''ve currently got a 0, put a 1, where it''s 1, put a 0...
...(0,0) ...(x,y)
...(0,1) ...(x,y+h)
...(1,1) ...(x+w, y+h)
...(1,0) ...(x+w, y)
miles -were you referring to my solution or the original posters???
Edited by - taybrin on September 5, 2001 9:37:13 PM
Edited by - taybrin on September 5, 2001 9:37:13 PM
Author
actually miles code helped. when i used yous taybrin''s code. it twisted the quad into 2 triangles.
my fault, i have never actually texture mapped anything i was just trying to line up your coorindates correctly. You had the coordinates mismatched but in order, i put them matched correctly but out of order!! we both learned something . . .
This topic is closed to new replies.
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