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Lines Matching defs:c1

360    VGfloat a1, a2, b1, b2, c1, c2; /* Coefficients of line eqns */
365    c1 = x2 * y1 - x1 * y2;
367    r3 = a1 * x3 + b1 * y3 + c1;
368    r4 = a1 * x4 + b1 * y4 + c1;