| … | |
… | |
| 170 | int h = 1000000; // height form heightmap |
170 | int h = 1000000; // height form heightmap |
| 171 | |
171 | |
| 172 | // the continent increases in height from 0 to ~700 levels in the absence of anything else |
172 | // the continent increases in height from 0 to ~700 levels in the absence of anything else |
| 173 | // thats about one step every 7 maps. |
173 | // thats about one step every 7 maps. |
| 174 | int base_height = blend (0, 300, xy_gradient, 0.2f, 0.9f); |
174 | int base_height = blend (0, 300, xy_gradient, 0.2f, 0.9f); |
| 175 | int river_height = base_height * 9 / 10; |
175 | int river_height = base_height; // * 9 / 10; |
| 176 | |
176 | |
| 177 | // add this to rivers to "dry them out" |
177 | // add this to rivers to "dry them out" |
| 178 | float dry_out = max (0.f, lerp (xy_gradient, 0.7f, 1.f, 0.f, 0.3f)); |
178 | float dry_out = max (0.f, lerp (xy_gradient, 0.7f, 1.f, 0.f, 0.3f)); |
| 179 | |
179 | |
| 180 | static frac2d river_gen (2); |
180 | static frac2d river_gen (2); |
| 181 | float river1 = abs (river_gen.fBm (P * 0.001 + perturb * 4)) + dry_out; |
181 | float river1 = abs (river_gen.fBm (P * 0.001 + perturb * 4)) + dry_out; |
| 182 | float river2 = river_gen.ridgedmultifractal (P * 0.04, 0.8, 10) - y_gradient * 0.2 - 0.16 - dry_out; |
182 | float river2 = river_gen.ridgedmultifractal (P * 0.04, 0.8, 10) - y_gradient * 0.2 - 0.16 - dry_out; |
| 183 | |
183 | |
| 184 | float valley = river1 - 0.2f; |
184 | float valley = river1 - 0.2f; |
| 185 | |
185 | |
| 186 | static frac2d mountain_gen (8, 2.14, 0.5); |
186 | static frac2d mountain_gen (6, 2.14, 0.5); |
| 187 | float mountain = mountain_gen.ridgedmultifractal (P * 0.004); |
187 | float mountain = mountain_gen.ridgedmultifractal (P * 0.004); |
| 188 | |
188 | |
| 189 | //TODO: mountains should not lower the height, should they? |
189 | //TODO: mountains should not lower the height, should they? |
| 190 | t = valley < 0 ? T_VALLEY : T_MOUNTAIN; |
190 | t = valley < 0 ? T_VALLEY : T_MOUNTAIN; |
| 191 | c = blend0 (vec3d (0, 0.8, 0), vec3d (0.8, 0, 0), valley, 0.1f); |
191 | c = blend0 (vec3d (0, 0.8, 0), vec3d (0.8, 0, 0), valley, 0.1f); |
| 192 | h = blend0 (base_height + continent * 300*0, base_height + mountain * xy_gradient * 400, valley, 0.1f); |
192 | h = blend0 (base_height + continent * 3, base_height + mountain * xy_gradient * 100, valley, 0.1f); |
| 193 | |
193 | |
| 194 | if (river1 < 0.01f) |
194 | if (river1 < 0.01f) |
| 195 | { |
195 | { |
| 196 | // main rivers - they cut deeply into the mountains (base_height * 0.9f) |
196 | // main rivers - they cut deeply into the mountains (base_height * 0.9f) |
| 197 | t = T_RIVER; |
197 | t = T_RIVER; |
| 198 | c = vec3d (0.2, 0.2, 1); |
198 | c = vec3d (0.2, 0.2, 1); |
| 199 | h0 = river_height; |
199 | h0 = river_height; |
| 200 | min_it (h, river_height + lerp<float> (river1, 0.f, 0.01f, -20, -1)); |
200 | min_it (h, river_height + lerp<float> (river1, 0.f, 0.01f, -10, -1)); |
| 201 | } |
201 | } |
| 202 | |
202 | |
| 203 | if (river2 > 0) |
203 | if (river2 > 0) |
| 204 | { |
204 | { |
| 205 | t = T_RIVER; |
205 | t = T_RIVER; |
| 206 | c = vec3d (0.2, 0.2, 1); |
206 | c = vec3d (0.2, 0.2, 1); |
| 207 | h0 = river_height; |
207 | h0 = river_height; |
| 208 | min_it (h, river_height + lerp<float> (river1, 0.f, 0.01f, -5, -1)); |
208 | min_it (h, river_height + max (-5, lerp<float> (river2, 0.01f, 0, -4, -1))); |
| 209 | } |
209 | } |
| 210 | |
210 | |
| 211 | if (continent < 0) |
211 | if (continent < 0) |
| 212 | { |
212 | { |
| 213 | t = T_OCEAN; |
213 | t = T_OCEAN; |
| … | |
… | |
| 287 | |
287 | |
| 288 | case T_UNDERGROUND: |
288 | case T_UNDERGROUND: |
| 289 | // todo, use a fractal |
289 | // todo, use a fractal |
| 290 | if (z < h - 10) |
290 | if (z < h - 10) |
| 291 | { |
291 | { |
| 292 | arch_floor = shstr ("quad_dirt_floor"); |
292 | arch_floor = shstr ("quad_stone_floor"); |
| 293 | arch_wall = shstr ("quad_dirt_wall"); |
293 | arch_wall = shstr ("quad_stone_wall"); |
| 294 | } |
294 | } |
| 295 | else |
295 | else |
| 296 | { |
296 | { |
| 297 | arch_floor = shstr ("quad_stone_floor"); |
297 | arch_floor = shstr ("quad_dirt_floor"); |
| 298 | arch_wall = shstr ("quad_stone_wall"); |
298 | arch_wall = shstr ("quad_dirt_wall"); |
| 299 | } |
299 | } |
| 300 | break; |
300 | break; |
| 301 | |
301 | |
| 302 | case T_ACQUIFER: |
302 | case T_ACQUIFER: |
| 303 | arch_wall = shstr ("quad_water_wall"); |
303 | arch_wall = shstr ("quad_water_wall"); |
| … | |
… | |
| 418 | } |
418 | } |
| 419 | #endif |
419 | #endif |
| 420 | |
420 | |
| 421 | exit (0); |
421 | exit (0); |
| 422 | } |
422 | } |
|
|
423 | |
