83 void rt_heightfield(void *tex, vector ctr, int m, int n, apiflt *field, apiflt wx, apiflt wy) {  in rt_heightfield()  argument
88     xoff = ctr.x - (wx / 2.0);  in rt_heightfield()
94             v0.x = wx * (xx) / (m * 1.0) + xoff;  in rt_heightfield()
98             v1.x = wx * (xx + 1) / (m * 1.0) + xoff;  in rt_heightfield()
102             v2.x = wx * (xx + 1) / (m * 1.0) + xoff;  in rt_heightfield()
108             v0.x = wx * (xx) / (m * 1.0) + xoff;  in rt_heightfield()
112             v1.x = wx * (xx) / (m * 1.0) + xoff;  in rt_heightfield()
116             v2.x = wx * (xx + 1) / (m * 1.0) + xoff;  in rt_heightfield()
126 rt_sheightfield(void *tex, vector ctr, int m, int n, apiflt *field, apiflt wx, apiflt wy) {  in rt_sheightfield()  argument
136     offset.x = ctr.x - (wx / 2.0);  in rt_sheightfield()
140     xinc = wx / ((apiflt)m);  in rt_sheightfield()
200                    apiflt wx,  in adjust()  argument
211         d = (abs(xa - xb) / (xres * 1.0)) * wx + (abs(ya - yb) / (yres * 1.0)) * wy;  in adjust()
225 subdivide(apiflt *base, int xres, int yres, apiflt wx, apiflt wy, int x1, int y1, int x2, int y2) {  in subdivide()  argument
235     adjust(base, xres, yres, wx, wy, x1, y1, x, y1, x2, y1);  in subdivide()
236     adjust(base, xres, yres, wx, wy, x2, y1, x2, y, x2, y2);  in subdivide()
237     adjust(base, xres, yres, wx, wy, x1, y2, x, y2, x2, y2);  in subdivide()
238     adjust(base, xres, yres, wx, wy, x1, y1, x1, y, x1, y2);  in subdivide()
246     subdivide(base, xres, yres, wx, wy, x1, y1, x, y);  in subdivide()
247     subdivide(base, xres, yres, wx, wy, x, y1, x2, y);  in subdivide()
248     subdivide(base, xres, yres, wx, wy, x, y, x2, y2);  in subdivide()
249     subdivide(base, xres, yres, wx, wy, x1, y, x, y2);  in subdivide()
252 void rt_landscape(void *tex, int m, int n, vector ctr, apiflt wx, apiflt wy) {  in rt_landscape()  argument
273     subdivide(field, m, n, wx, wy, 0, 0, m - 1, n - 1);  in rt_landscape()
275     rt_sheightfield(tex, ctr, m, n, field, wx, wy);  in rt_landscape()