72                 a.x = points[i].x - points[i - 1].x;  in rt_polycylinder()
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()
131     int x, y, addr;  in rt_sheightfield()  local
136     offset.x = ctr.x - (wx / 2.0);  in rt_sheightfield()
145         for (x = 0; x < m; x++) {  in rt_sheightfield()
146             addr = y * m + x;  in rt_sheightfield()
148                 rt_vector(x * xinc + offset.x, field[addr] + offset.z, y * yinc + offset.y);  in rt_sheightfield()
153     for (x = 1; x < m; x++) {  in rt_sheightfield()
154         normals[x] = normals[(n - 1) * m + x] = rt_vector(0.0, 1.0, 0.0);  in rt_sheightfield()
160         for (x = 1; x < (m - 1); x++) {  in rt_sheightfield()
161             addr = y * m + x;  in rt_sheightfield()
173         for (x = 0; x < (m - 1); x++) {  in rt_sheightfield()
174             addr = y * m + x;  in rt_sheightfield()
204                    int x,  in adjust()  argument
210     if (base[x + (xres * y)] == 0.0) {  in adjust()
220         base[x + (xres * y)] = v;  in adjust()
226     long x, y;  in subdivide()  local
232     x = (x1 + x2) / 2;  in subdivide()
235     adjust(base, xres, yres, wx, wy, x1, y1, x, y1, x2, y1);  in subdivide()
237     adjust(base, xres, yres, wx, wy, x1, y2, x, y2, x2, y2);  in subdivide()
240     if (base[x + xres * y] == 0.0) {  in subdivide()
241         base[x + (xres * y)] = (base[x1 + xres * y1] + base[x2 + xres * y1] + base[x2 + xres * 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()
253     int totalsize, x, y;  in rt_landscape()  local
263         for (x = 0; x < m; x++) {  in rt_landscape()
264             field[x + y * m] = 0.0;  in rt_landscape()