91 #define curve t->segments[i - 3]  in prepare_transfer_fn()  macro
106     curve.x = line2.x - r * cos(theta);  in prepare_transfer_fn()
107     curve.y = line2.y - r * sin(theta);  in prepare_transfer_fn()
115     cx = (curve.x + line2.x + x) / 3;  in prepare_transfer_fn()
116     cy = (curve.y + line2.y + y) / 3;  in prepare_transfer_fn()
121     in1 = cx - curve.x;  in prepare_transfer_fn()
122     out1 = cy - curve.y;  in prepare_transfer_fn()
123     in2 = line2.x - curve.x;  in prepare_transfer_fn()
124     out2 = line2.y - curve.y;  in prepare_transfer_fn()
125     curve.a = (out2/in2 - out1/in1) / (in2-in1);  in prepare_transfer_fn()
126     curve.b = out1/in1 - curve.a*in1;  in prepare_transfer_fn()
129 #undef curve  in prepare_transfer_fn()