1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/tesquad.cc	Sun Nov 10 14:02:36 2013 +0200
     1.3 @@ -0,0 +1,46 @@
     1.4 +#include <GL/gl.h>
     1.5 +#include "tesquad.h"
     1.6 +
     1.7 +void draw_tess_quad(float x, float y, float w, float h, int usub, int vsub, bool ortho)
     1.8 +{
     1.9 +	if(ortho) {
    1.10 +		glPushAttrib(GL_ENABLE_BIT);
    1.11 +		glDisable(GL_DEPTH_TEST);
    1.12 +		glDisable(GL_LIGHTING);
    1.13 +
    1.14 +		glMatrixMode(GL_PROJECTION);
    1.15 +		glPushMatrix();
    1.16 +		glLoadIdentity();
    1.17 +	}
    1.18 +
    1.19 +	float du = 1.0 / usub;
    1.20 +	float dv = 1.0 / vsub;
    1.21 +
    1.22 +	float dx = du * w;
    1.23 +	float dy = dv * h;
    1.24 +
    1.25 +	glBegin(GL_QUADS);
    1.26 +	for (int i=0; i<vsub; i++) {
    1.27 +		for (int j=0; j<usub; j++) {
    1.28 +			float u = j * du;
    1.29 +			float v = 1.0 - i * dv;
    1.30 +			float sx = x + j * dx;
    1.31 +			float sy = y + i * dy;
    1.32 +
    1.33 +			glTexCoord2f(u, v);
    1.34 +			glVertex2f(sx, sy);
    1.35 +			glTexCoord2f(u + du, v);
    1.36 +			glVertex2f(sx + dx, sy);
    1.37 +			glTexCoord2f(u + du, v - dv);
    1.38 +			glVertex2f(sx + dx, sy + dy);
    1.39 +			glTexCoord2f(u, v - dv);
    1.40 +			glVertex2f(sx, sy + dy);
    1.41 +		}
    1.42 +	}
    1.43 +	glEnd();
    1.44 +
    1.45 +	if(ortho) {
    1.46 +		glPopMatrix();
    1.47 +		glPopAttrib();
    1.48 +	}
    1.49 +}