glMax2d
BlitzMax Forums/BlitzMax Beginners Area/glMax2d
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Hi All Thanks for any help in advance... I am wanting to draw some simple polygons using DrawLine(x1,y1,x2,y2) under OpenGL but my program keeps crashing in Max2D? I have set the viewport size, GLGraphics 640,480,0 Could this be a clipping error, ie crashes as x,y is off screen?? Its been a while since I used Max but I assumed that once the GLGraphics was set you could just use the standard Max2D commands? Or am I wrong? |
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I'm really not sure about this. First, do you want to use opengl directly or just use the opengl graphics driver? (Silly question but you admitted you've been away a while :) I made a test, and as you say it crashes because there's no graphics driver set. But I added DrawRect and DrawLine calls to my opengl GUI app and they work. There are also specific opengl commands: glDrawText, glDrawRect etc. Here's some simple opengl line drawing code tho if helps.. GLGraphics 640, 480 While Not AppTerminate() glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) glLoadIdentity() glLineWidth( 2.0 ) glBegin( GL_LINES ) glColor3f( 1,0,0 ) glVertex3f( 0, 0, 0 ) glVertex3f( 20, 0, 0 ) glColor3f( 0,1,0 ) glvertex3f( 0, 0, 0 ) glVertex3f( 0, 0, -20 ) glColor3f( 0,0,1 ) glVertex3f( 0, 0, 0 ) glVertex3f( 0, 20, 0 ) glEnd Flip 1 Wend |
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DrawLine is a Max2D function. You have to have a Max2D driver (like GLMax2D) set in order to use it. For example, SetGraphicsDriver GLMax2DDriver() Graphics 640,480 By calling GLGraphics, you basically doing this, SetGraphicsDriver GLGraphicsDriver() Graphics 800,600 |