| … | |
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| 173 | { |
173 | { |
| 174 | T pmap[N]; |
174 | T pmap[N]; |
| 175 | |
175 | |
| 176 | void seed (seedable_rand_gen &rng); |
176 | void seed (seedable_rand_gen &rng); |
| 177 | |
177 | |
| 178 | T operator ()(T v) func_pure |
178 | ecb_pure T operator ()(T v) |
| 179 | { |
179 | { |
| 180 | return pmap[v & T(N - 1)]; |
180 | return pmap[v & T(N - 1)]; |
| 181 | } |
181 | } |
| 182 | }; |
182 | }; |
| 183 | |
183 | |
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| 191 | typedef typename vec_t::T_numtype value_t; |
191 | typedef typename vec_t::T_numtype value_t; |
| 192 | |
192 | |
| 193 | void seed (seedable_rand_gen &rng); |
193 | void seed (seedable_rand_gen &rng); |
| 194 | void seed (seed_t seed); |
194 | void seed (seed_t seed); |
| 195 | |
195 | |
| 196 | value_t operator ()(vec_t P, uint32_t seed = 0) func_pure; |
196 | ecb_pure value_t operator ()(vec_t P, uint32_t seed = 0); |
| 197 | }; |
197 | }; |
| 198 | |
198 | |
| 199 | template<class vec_t> |
199 | template<class vec_t> |
| 200 | struct noise_gen; |
200 | struct noise_gen; |
| 201 | |
201 | |
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| 214 | static vec3d::T_numtype abs_avg() { return 0.415; } // avg(abs(noise)) |
214 | static vec3d::T_numtype abs_avg() { return 0.415; } // avg(abs(noise)) |
| 215 | |
215 | |
| 216 | using noise_gen_base<vec3d>::operator (); |
216 | using noise_gen_base<vec3d>::operator (); |
| 217 | |
217 | |
| 218 | // noise projected on a surface with normal n |
218 | // noise projected on a surface with normal n |
| 219 | vec2d::T_numtype operator() (vec3d P, vec3d N, uint32_t seed = 0) func_pure; |
219 | ecb_pure vec2d::T_numtype operator() (vec3d P, vec3d N, uint32_t seed = 0); |
| 220 | }; |
220 | }; |
| 221 | |
221 | |
| 222 | typedef noise_gen<vec2d> noise2d; |
222 | typedef noise_gen<vec2d> noise2d; |
| 223 | typedef noise_gen<vec3d> noise3d; |
223 | typedef noise_gen<vec3d> noise3d; |
| 224 | |
224 | |
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| 237 | value_t fbm_mul[MAX_OCTAVES]; |
237 | value_t fbm_mul[MAX_OCTAVES]; |
| 238 | rotate_xy<vec_t> rot[MAX_OCTAVES]; |
238 | rotate_xy<vec_t> rot[MAX_OCTAVES]; |
| 239 | |
239 | |
| 240 | frac_gen (int octaves = 3, value_t lacunarity = 2, value_t hurst_expo = .5, uint32_t seed = 0); |
240 | frac_gen (int octaves = 3, value_t lacunarity = 2, value_t hurst_expo = .5, uint32_t seed = 0); |
| 241 | |
241 | |
| 242 | value_t noise (vec_t P, uint32_t seed = 0) func_pure |
242 | ecb_pure value_t noise (vec_t P, uint32_t seed = 0) |
| 243 | { |
243 | { |
| 244 | return this->operator() (P, seed); |
244 | return this->operator() (P, seed); |
| 245 | } |
245 | } |
| 246 | |
246 | |
| 247 | value_t fBm (vec_t P) func_pure; |
247 | ecb_pure value_t fBm (vec_t P); |
| 248 | value_t turbulence (vec_t P) func_pure; |
248 | ecb_pure value_t turbulence (vec_t P); |
| 249 | value_t multifractal (vec_t P, value_t offset = 1) func_pure; |
249 | ecb_pure value_t multifractal (vec_t P, value_t offset = 1); |
| 250 | value_t heterofractal (vec_t P, value_t offset = 1) func_pure; |
250 | ecb_pure value_t heterofractal (vec_t P, value_t offset = 1); |
| 251 | value_t hybridfractal (vec_t P, value_t offset = 1, value_t gain = 1) func_pure; |
251 | ecb_pure value_t hybridfractal (vec_t P, value_t offset = 1, value_t gain = 1); |
| 252 | value_t ridgedmultifractal (vec_t P, value_t offset = 1, value_t gain = 8) func_pure; |
252 | ecb_pure value_t ridgedmultifractal (vec_t P, value_t offset = 1, value_t gain = 8); |
| 253 | value_t billowfractal (vec_t P, value_t offset = 1, value_t gain = 2) func_pure; |
253 | ecb_pure value_t billowfractal (vec_t P, value_t offset = 1, value_t gain = 2); |
| 254 | value_t terrain (vec_t P) func_pure; |
254 | ecb_pure value_t terrain (vec_t P); |
| 255 | value_t terrain2 (vec_t P) func_pure; |
255 | ecb_pure value_t terrain2 (vec_t P); |
| 256 | }; |
256 | }; |
| 257 | |
257 | |
| 258 | typedef frac_gen<vec2d> frac2d; |
258 | typedef frac_gen<vec2d> frac2d; |
| 259 | typedef frac_gen<vec3d> frac3d; |
259 | typedef frac_gen<vec3d> frac3d; |
| 260 | |
260 | |
