39 lines
1011 B
C++
39 lines
1011 B
C++
#include "GridOverlay.h"
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#include <GL/gl.h>
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GridOverlay::GridOverlay( double inAnchorX, double inAnchorY,
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double inWidth, double inHeight,
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int inNumCells, Color inColor )
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: GUIComponentGL( inAnchorX, inAnchorY, inWidth, inHeight ),
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mNumCells( inNumCells ),
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mColor( inColor ) {
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}
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void GridOverlay::fireRedraw() {
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double cellWidth = mWidth / mNumCells;
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double cellHeight = mHeight / mNumCells;
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glColor4f( mColor.r, mColor.g, mColor.b, mColor.a );
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glBegin( GL_LINES ); {
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for( int x=0; x<mNumCells+1; x++ ) {
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glVertex2d( mAnchorX + x * cellWidth, mAnchorY );
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glVertex2d( mAnchorX + x * cellWidth, mAnchorY + mHeight );
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}
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for( int y=0; y<mNumCells+1; y++ ) {
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glVertex2d( mAnchorX, mAnchorY + y * cellHeight );
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glVertex2d( mAnchorX + mWidth, mAnchorY + y * cellHeight );
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}
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}
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glEnd();
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}
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