Jarkko Poyry | 3c82736 | 2014-09-02 11:48:52 +0300 | [diff] [blame] | 1 | #ifndef _RSGBUILTINFUNCTIONS_HPP |
| 2 | #define _RSGBUILTINFUNCTIONS_HPP |
| 3 | /*------------------------------------------------------------------------- |
| 4 | * drawElements Quality Program Random Shader Generator |
| 5 | * ---------------------------------------------------- |
| 6 | * |
| 7 | * Copyright 2014 The Android Open Source Project |
| 8 | * |
| 9 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 10 | * you may not use this file except in compliance with the License. |
| 11 | * You may obtain a copy of the License at |
| 12 | * |
| 13 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 14 | * |
| 15 | * Unless required by applicable law or agreed to in writing, software |
| 16 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 17 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 18 | * See the License for the specific language governing permissions and |
| 19 | * limitations under the License. |
| 20 | * |
| 21 | *//*! |
| 22 | * \file |
| 23 | * \brief Built-in Functions. |
| 24 | *//*--------------------------------------------------------------------*/ |
| 25 | |
| 26 | #include "rsgDefs.hpp" |
| 27 | #include "rsgExpression.hpp" |
| 28 | #include "rsgUtils.hpp" |
| 29 | #include "deMath.h" |
| 30 | |
| 31 | namespace rsg |
| 32 | { |
| 33 | |
| 34 | // Template for built-in functions with form "GenType func(GenType val)". |
| 35 | template <class GetValueRangeWeight, class ComputeValueRange, class Evaluate> |
| 36 | class UnaryBuiltinVecFunc : public Expression |
| 37 | { |
| 38 | public: |
| 39 | UnaryBuiltinVecFunc (GeneratorState& state, const char* function, ConstValueRangeAccess valueRange); |
| 40 | virtual ~UnaryBuiltinVecFunc (void); |
| 41 | |
| 42 | Expression* createNextChild (GeneratorState& state); |
| 43 | void tokenize (GeneratorState& state, TokenStream& str) const; |
| 44 | |
| 45 | void evaluate (ExecutionContext& execCtx); |
| 46 | ExecConstValueAccess getValue (void) const { return m_value.getValue(m_inValueRange.getType()); } |
| 47 | |
| 48 | static float getWeight (const GeneratorState& state, ConstValueRangeAccess valueRange); |
| 49 | |
| 50 | private: |
| 51 | std::string m_function; |
| 52 | ValueRange m_inValueRange; |
| 53 | ExecValueStorage m_value; |
| 54 | Expression* m_child; |
| 55 | }; |
| 56 | |
| 57 | template <class GetValueRangeWeight, class ComputeValueRange, class Evaluate> |
| 58 | UnaryBuiltinVecFunc<GetValueRangeWeight, ComputeValueRange, Evaluate>::UnaryBuiltinVecFunc (GeneratorState& state, const char* function, ConstValueRangeAccess valueRange) |
| 59 | : m_function (function) |
| 60 | , m_inValueRange (valueRange.getType()) |
| 61 | , m_child (DE_NULL) |
| 62 | { |
| 63 | DE_UNREF(state); |
| 64 | DE_ASSERT(valueRange.getType().isFloatOrVec()); |
| 65 | |
| 66 | m_value.setStorage(valueRange.getType()); |
| 67 | |
| 68 | // Compute input value range |
| 69 | for (int ndx = 0; ndx < m_inValueRange.getType().getNumElements(); ndx++) |
| 70 | { |
| 71 | ConstValueRangeAccess outRange = valueRange.component(ndx); |
| 72 | ValueRangeAccess inRange = m_inValueRange.asAccess().component(ndx); |
| 73 | |
| 74 | ComputeValueRange()(outRange.getMin().asFloat(), outRange.getMax().asFloat(), inRange.getMin().asFloat(), inRange.getMax().asFloat()); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | template <class GetValueRangeWeight, class ComputeValueRange, class Evaluate> |
| 79 | UnaryBuiltinVecFunc<GetValueRangeWeight, ComputeValueRange, Evaluate>::~UnaryBuiltinVecFunc (void) |
| 80 | { |
| 81 | delete m_child; |
| 82 | } |
| 83 | |
| 84 | template <class GetValueRangeWeight, class ComputeValueRange, class Evaluate> |
| 85 | Expression* UnaryBuiltinVecFunc<GetValueRangeWeight, ComputeValueRange, Evaluate>::createNextChild (GeneratorState& state) |
| 86 | { |
| 87 | if (m_child) |
| 88 | return DE_NULL; |
| 89 | |
Jarkko Pöyry | ba84b6d | 2015-05-19 17:44:29 -0700 | [diff] [blame] | 90 | m_child = Expression::createRandom(state, m_inValueRange.asAccess()); |
Jarkko Poyry | 3c82736 | 2014-09-02 11:48:52 +0300 | [diff] [blame] | 91 | return m_child; |
| 92 | } |
| 93 | |
| 94 | template <class GetValueRangeWeight, class ComputeValueRange, class Evaluate> |
| 95 | void UnaryBuiltinVecFunc<GetValueRangeWeight, ComputeValueRange, Evaluate>::tokenize (GeneratorState& state, TokenStream& str) const |
| 96 | { |
| 97 | str << Token(m_function.c_str()) << Token::LEFT_PAREN; |
| 98 | m_child->tokenize(state, str); |
| 99 | str << Token::RIGHT_PAREN; |
| 100 | } |
| 101 | |
| 102 | template <class GetValueRangeWeight, class ComputeValueRange, class Evaluate> |
| 103 | void UnaryBuiltinVecFunc<GetValueRangeWeight, ComputeValueRange, Evaluate>::evaluate (ExecutionContext& execCtx) |
| 104 | { |
| 105 | m_child->evaluate(execCtx); |
| 106 | |
| 107 | ExecConstValueAccess srcValue = m_child->getValue(); |
| 108 | ExecValueAccess dstValue = m_value.getValue(m_inValueRange.getType()); |
| 109 | |
| 110 | for (int elemNdx = 0; elemNdx < m_inValueRange.getType().getNumElements(); elemNdx++) |
| 111 | { |
| 112 | ExecConstValueAccess srcComp = srcValue.component(elemNdx); |
| 113 | ExecValueAccess dstComp = dstValue.component(elemNdx); |
| 114 | |
| 115 | for (int compNdx = 0; compNdx < EXEC_VEC_WIDTH; compNdx++) |
| 116 | dstComp.asFloat(compNdx) = Evaluate()(srcComp.asFloat(compNdx)); |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | template <class GetValueRangeWeight, class ComputeValueRange, class Evaluate> |
| 121 | float UnaryBuiltinVecFunc<GetValueRangeWeight, ComputeValueRange, Evaluate>::getWeight (const GeneratorState& state, ConstValueRangeAccess valueRange) |
| 122 | { |
| 123 | // \todo [2011-06-14 pyry] Void support? |
| 124 | if (!valueRange.getType().isFloatOrVec()) |
| 125 | return 0.0f; |
| 126 | |
| 127 | int availableLevels = state.getShaderParameters().maxExpressionDepth - state.getExpressionDepth(); |
| 128 | |
| 129 | if (availableLevels < getConservativeValueExprDepth(state, valueRange) + 1) |
| 130 | return 0.0f; |
| 131 | |
| 132 | // Compute value range weight |
| 133 | float combinedWeight = 1.0f; |
| 134 | for (int elemNdx = 0; elemNdx < valueRange.getType().getNumElements(); elemNdx++) |
| 135 | { |
| 136 | float elemWeight = GetValueRangeWeight()(valueRange.component(elemNdx).getMin().asFloat(), valueRange.component(elemNdx).getMax().asFloat()); |
| 137 | combinedWeight *= elemWeight; |
| 138 | } |
| 139 | |
| 140 | return combinedWeight; |
| 141 | } |
| 142 | |
| 143 | // Proxy template. |
| 144 | template <class C> |
| 145 | struct GetUnaryBuiltinVecWeight |
| 146 | { |
| 147 | inline float operator() (float outMin, float outMax) const { return C::getCompWeight(outMin, outMax); } |
| 148 | }; |
| 149 | |
| 150 | template <class C> |
| 151 | struct ComputeUnaryBuiltinVecRange |
| 152 | { |
| 153 | inline void operator() (float outMin, float outMax, float& inMin, float& inMax) const { C::computeValueRange(outMin, outMax, inMin, inMax); } |
| 154 | }; |
| 155 | |
| 156 | template <class C> |
| 157 | struct EvaluateUnaryBuiltinVec |
| 158 | { |
| 159 | inline float operator() (float inVal) const { return C::evaluateComp(inVal); } |
| 160 | }; |
| 161 | |
| 162 | template <class C> |
| 163 | class UnaryBuiltinVecTemplateProxy : public UnaryBuiltinVecFunc<GetUnaryBuiltinVecWeight<C>, ComputeUnaryBuiltinVecRange<C>, EvaluateUnaryBuiltinVec<C> > |
| 164 | { |
| 165 | public: |
| 166 | UnaryBuiltinVecTemplateProxy (GeneratorState& state, const char* function, ConstValueRangeAccess valueRange) |
| 167 | : UnaryBuiltinVecFunc<GetUnaryBuiltinVecWeight<C>, ComputeUnaryBuiltinVecRange<C>, EvaluateUnaryBuiltinVec<C> >(state, function, valueRange) |
| 168 | { |
| 169 | } |
| 170 | }; |
| 171 | |
| 172 | // Template for trigonometric function group. |
| 173 | template <class C> |
| 174 | class UnaryTrigonometricFunc : public UnaryBuiltinVecTemplateProxy<C> |
| 175 | { |
| 176 | public: |
| 177 | UnaryTrigonometricFunc (GeneratorState& state, const char* function, ConstValueRangeAccess valueRange) |
| 178 | : UnaryBuiltinVecTemplateProxy<C>(state, function, valueRange) |
| 179 | { |
| 180 | } |
| 181 | |
| 182 | static inline float getCompWeight (float outMin, float outMax) |
| 183 | { |
| 184 | if (Scalar::min<float>() == outMin || Scalar::max<float>() == outMax) |
| 185 | return 1.0f; // Infinite value range, anything goes |
| 186 | |
| 187 | // Transform range |
| 188 | float inMin, inMax; |
| 189 | if (!C::transformValueRange(outMin, outMax, inMin, inMax)) |
| 190 | return 0.0f; // Not possible to transform value range (out of range perhaps) |
| 191 | |
| 192 | // Quantize |
| 193 | if (!quantizeFloatRange(inMin, inMax)) |
| 194 | return 0.0f; // Not possible to quantize - would cause accuracy issues |
| 195 | |
| 196 | if (outMin == outMax) |
| 197 | return 1.0f; // Constant value and passed quantization |
| 198 | |
| 199 | // Evaluate new intersection |
| 200 | float intersectionLen = C::evaluateComp(inMax) - C::evaluateComp(inMin); |
| 201 | float valRangeLen = outMax - outMin; |
| 202 | |
| 203 | return deFloatMax(0.1f, intersectionLen/valRangeLen); |
| 204 | } |
| 205 | |
| 206 | static inline void computeValueRange (float outMin, float outMax, float& inMin, float& inMax) |
| 207 | { |
| 208 | DE_VERIFY(C::transformValueRange(outMin, outMax, inMin, inMax)); |
| 209 | DE_VERIFY(quantizeFloatRange(inMin, inMax)); |
| 210 | DE_ASSERT(inMin <= inMax); |
| 211 | } |
| 212 | |
| 213 | static float getWeight (const GeneratorState& state, ConstValueRangeAccess valueRange) |
| 214 | { |
| 215 | if (state.getProgramParameters().trigonometricBaseWeight <= 0.0f) |
| 216 | return 0.0f; |
| 217 | |
| 218 | return UnaryBuiltinVecTemplateProxy<C>::getWeight(state, valueRange) * state.getProgramParameters().trigonometricBaseWeight; |
| 219 | } |
| 220 | }; |
| 221 | |
| 222 | class SinOp : public UnaryTrigonometricFunc<SinOp> |
| 223 | { |
| 224 | public: |
| 225 | SinOp (GeneratorState& state, ConstValueRangeAccess valueRange) |
| 226 | : UnaryTrigonometricFunc<SinOp>(state, "sin", valueRange) |
| 227 | { |
| 228 | } |
| 229 | |
| 230 | static inline bool transformValueRange (float outMin, float outMax, float& inMin, float& inMax) |
| 231 | { |
| 232 | if (outMax < -1.0f || outMin > 1.0f) |
| 233 | return false; |
| 234 | |
| 235 | inMin = (outMin >= -1.0f) ? deFloatAsin(outMin) : -0.5f*DE_PI; |
| 236 | inMax = (outMax <= +1.0f) ? deFloatAsin(outMax) : +0.5f*DE_PI; |
| 237 | |
| 238 | return true; |
| 239 | } |
| 240 | |
| 241 | static inline float evaluateComp (float inVal) |
| 242 | { |
| 243 | return deFloatSin(inVal); |
| 244 | } |
| 245 | }; |
| 246 | |
| 247 | class CosOp : public UnaryTrigonometricFunc<CosOp> |
| 248 | { |
| 249 | public: |
| 250 | CosOp (GeneratorState& state, ConstValueRangeAccess valueRange) |
| 251 | : UnaryTrigonometricFunc<CosOp>(state, "cos", valueRange) |
| 252 | { |
| 253 | } |
| 254 | |
| 255 | static inline bool transformValueRange (float outMin, float outMax, float& inMin, float& inMax) |
| 256 | { |
| 257 | if (outMax < -1.0f || outMin > 1.0f) |
| 258 | return false; |
| 259 | |
| 260 | inMax = (outMin >= -1.0f) ? deFloatAcos(outMin) : +DE_PI; |
| 261 | inMin = (outMax <= +1.0f) ? deFloatAcos(outMax) : -DE_PI; |
| 262 | |
| 263 | return true; |
| 264 | } |
| 265 | |
| 266 | static inline float evaluateComp (float inVal) |
| 267 | { |
| 268 | return deFloatCos(inVal); |
| 269 | } |
| 270 | }; |
| 271 | |
| 272 | class TanOp : public UnaryTrigonometricFunc<TanOp> |
| 273 | { |
| 274 | public: |
| 275 | TanOp (GeneratorState& state, ConstValueRangeAccess valueRange) |
| 276 | : UnaryTrigonometricFunc<TanOp>(state, "tan", valueRange) |
| 277 | { |
| 278 | } |
| 279 | |
| 280 | static inline bool transformValueRange (float outMin, float outMax, float& inMin, float& inMax) |
| 281 | { |
| 282 | // \note Currently tan() is limited to -4..4 range. Otherwise we will run into accuracy issues |
| 283 | const float rangeMin = -4.0f; |
| 284 | const float rangeMax = +4.0f; |
| 285 | |
| 286 | if (outMax < rangeMin || outMin > rangeMax) |
| 287 | return false; |
| 288 | |
| 289 | inMin = deFloatAtanOver(deFloatMax(outMin, rangeMin)); |
| 290 | inMax = deFloatAtanOver(deFloatMin(outMax, rangeMax)); |
| 291 | |
| 292 | return true; |
| 293 | } |
| 294 | |
| 295 | static inline float evaluateComp (float inVal) |
| 296 | { |
| 297 | return deFloatTan(inVal); |
| 298 | } |
| 299 | }; |
| 300 | |
| 301 | class AsinOp : public UnaryTrigonometricFunc<AsinOp> |
| 302 | { |
| 303 | public: |
| 304 | AsinOp (GeneratorState& state, ConstValueRangeAccess valueRange) |
| 305 | : UnaryTrigonometricFunc<AsinOp>(state, "asin", valueRange) |
| 306 | { |
| 307 | } |
| 308 | |
| 309 | static inline bool transformValueRange (float outMin, float outMax, float& inMin, float& inMax) |
| 310 | { |
| 311 | const float rangeMin = -DE_PI/2.0f; |
| 312 | const float rangeMax = +DE_PI/2.0f; |
| 313 | |
| 314 | if (outMax < rangeMin || outMin > rangeMax) |
| 315 | return false; // Out of range |
| 316 | |
| 317 | inMin = deFloatSin(deFloatMax(outMin, rangeMin)); |
| 318 | inMax = deFloatSin(deFloatMin(outMax, rangeMax)); |
| 319 | |
| 320 | return true; |
| 321 | } |
| 322 | |
| 323 | static inline float evaluateComp (float inVal) |
| 324 | { |
| 325 | return deFloatAsin(inVal); |
| 326 | } |
| 327 | }; |
| 328 | |
| 329 | class AcosOp : public UnaryTrigonometricFunc<AcosOp> |
| 330 | { |
| 331 | public: |
| 332 | AcosOp (GeneratorState& state, ConstValueRangeAccess valueRange) |
| 333 | : UnaryTrigonometricFunc<AcosOp>(state, "acos", valueRange) |
| 334 | { |
| 335 | } |
| 336 | |
| 337 | static inline bool transformValueRange (float outMin, float outMax, float& inMin, float& inMax) |
| 338 | { |
| 339 | const float rangeMin = 0.0f; |
| 340 | const float rangeMax = DE_PI; |
| 341 | |
| 342 | if (outMax < rangeMin || outMin > rangeMax) |
| 343 | return false; // Out of range |
| 344 | |
| 345 | inMax = deFloatCos(deFloatMax(outMin, rangeMin)); |
| 346 | inMin = deFloatCos(deFloatMin(outMax, rangeMax)); |
| 347 | |
| 348 | return true; |
| 349 | } |
| 350 | |
| 351 | static inline float evaluateComp (float inVal) |
| 352 | { |
| 353 | return deFloatAcos(inVal); |
| 354 | } |
| 355 | }; |
| 356 | |
| 357 | class AtanOp : public UnaryTrigonometricFunc<AtanOp> |
| 358 | { |
| 359 | public: |
| 360 | AtanOp (GeneratorState& state, ConstValueRangeAccess valueRange) |
| 361 | : UnaryTrigonometricFunc<AtanOp>(state, "atan", valueRange) |
| 362 | { |
| 363 | } |
| 364 | |
| 365 | static inline bool transformValueRange (float outMin, float outMax, float& inMin, float& inMax) |
| 366 | { |
| 367 | // \note For accuracy reasons output range is limited to -1..1 |
| 368 | const float rangeMin = -1.0f; |
| 369 | const float rangeMax = +1.0f; |
| 370 | |
| 371 | if (outMax < rangeMin || outMin > rangeMax) |
| 372 | return false; // Out of range |
| 373 | |
| 374 | inMin = deFloatTan(deFloatMax(outMin, rangeMin)); |
| 375 | inMax = deFloatTan(deFloatMin(outMax, rangeMax)); |
| 376 | |
| 377 | return true; |
| 378 | } |
| 379 | |
| 380 | static inline float evaluateComp (float inVal) |
| 381 | { |
| 382 | return deFloatAtanOver(inVal); |
| 383 | } |
| 384 | }; |
| 385 | |
| 386 | // Template for exponential function group. |
| 387 | // \todo [2011-07-07 pyry] Shares most of the code with Trigonometric variant.. |
| 388 | template <class C> |
| 389 | class UnaryExponentialFunc : public UnaryBuiltinVecTemplateProxy<C> |
| 390 | { |
| 391 | public: |
| 392 | UnaryExponentialFunc (GeneratorState& state, const char* function, ConstValueRangeAccess valueRange) |
| 393 | : UnaryBuiltinVecTemplateProxy<C>(state, function, valueRange) |
| 394 | { |
| 395 | } |
| 396 | |
| 397 | static inline float getCompWeight (float outMin, float outMax) |
| 398 | { |
| 399 | if (Scalar::min<float>() == outMin || Scalar::max<float>() == outMax) |
| 400 | return 1.0f; // Infinite value range, anything goes |
| 401 | |
| 402 | // Transform range |
| 403 | float inMin, inMax; |
| 404 | if (!C::transformValueRange(outMin, outMax, inMin, inMax)) |
| 405 | return 0.0f; // Not possible to transform value range (out of range perhaps) |
| 406 | |
| 407 | // Quantize |
| 408 | if (!quantizeFloatRange(inMin, inMax)) |
| 409 | return 0.0f; // Not possible to quantize - would cause accuracy issues |
| 410 | |
| 411 | if (outMin == outMax) |
| 412 | return 1.0f; // Constant value and passed quantization |
| 413 | |
| 414 | // Evaluate new intersection |
| 415 | float intersectionLen = C::evaluateComp(inMax) - C::evaluateComp(inMin); |
| 416 | float valRangeLen = outMax - outMin; |
| 417 | |
| 418 | return deFloatMax(0.1f, intersectionLen/valRangeLen); |
| 419 | } |
| 420 | |
| 421 | static inline void computeValueRange (float outMin, float outMax, float& inMin, float& inMax) |
| 422 | { |
| 423 | DE_VERIFY(C::transformValueRange(outMin, outMax, inMin, inMax)); |
| 424 | DE_VERIFY(quantizeFloatRange(inMin, inMax)); |
| 425 | DE_ASSERT(inMin <= inMax); |
| 426 | } |
| 427 | |
| 428 | static float getWeight (const GeneratorState& state, ConstValueRangeAccess valueRange) |
| 429 | { |
| 430 | if (state.getProgramParameters().exponentialBaseWeight <= 0.0f) |
| 431 | return 0.0f; |
| 432 | |
| 433 | return UnaryBuiltinVecTemplateProxy<C>::getWeight(state, valueRange) * state.getProgramParameters().exponentialBaseWeight; |
| 434 | } |
| 435 | }; |
| 436 | |
| 437 | class ExpOp : public UnaryExponentialFunc<ExpOp> |
| 438 | { |
| 439 | public: |
| 440 | ExpOp (GeneratorState& state, ConstValueRangeAccess valueRange) |
| 441 | : UnaryExponentialFunc<ExpOp>(state, "exp", valueRange) |
| 442 | { |
| 443 | } |
| 444 | |
| 445 | static inline bool transformValueRange (float outMin, float outMax, float& inMin, float& inMax) |
| 446 | { |
| 447 | // Limited due to accuracy reasons, should be 0..+inf |
| 448 | const float rangeMin = 0.1f; |
| 449 | const float rangeMax = 10.0f; |
| 450 | |
| 451 | if (outMax < rangeMin || outMin > rangeMax) |
| 452 | return false; // Out of range |
| 453 | |
| 454 | inMin = deFloatLog(deFloatMax(outMin, rangeMin)); |
| 455 | inMax = deFloatLog(deFloatMin(outMax, rangeMax)); |
| 456 | |
| 457 | return true; |
| 458 | } |
| 459 | |
| 460 | static inline float evaluateComp (float inVal) |
| 461 | { |
| 462 | return deFloatExp(inVal); |
| 463 | } |
| 464 | }; |
| 465 | |
| 466 | class LogOp : public UnaryExponentialFunc<LogOp> |
| 467 | { |
| 468 | public: |
| 469 | LogOp (GeneratorState& state, ConstValueRangeAccess valueRange) |
| 470 | : UnaryExponentialFunc<LogOp>(state, "log", valueRange) |
| 471 | { |
| 472 | } |
| 473 | |
| 474 | static inline bool transformValueRange (float outMin, float outMax, float& inMin, float& inMax) |
| 475 | { |
| 476 | // Limited due to accuracy reasons, should be -inf..+inf |
| 477 | const float rangeMin = 0.1f; |
| 478 | const float rangeMax = 6.0f; |
| 479 | |
| 480 | if (outMax < rangeMin || outMin > rangeMax) |
| 481 | return false; // Out of range |
| 482 | |
| 483 | inMin = deFloatExp(deFloatMax(outMin, rangeMin)); |
| 484 | inMax = deFloatExp(deFloatMin(outMax, rangeMax)); |
| 485 | |
| 486 | return true; |
| 487 | } |
| 488 | |
| 489 | static inline float evaluateComp (float inVal) |
| 490 | { |
| 491 | return deFloatLog(inVal); |
| 492 | } |
| 493 | }; |
| 494 | |
| 495 | class Exp2Op : public UnaryExponentialFunc<Exp2Op> |
| 496 | { |
| 497 | public: |
| 498 | Exp2Op (GeneratorState& state, ConstValueRangeAccess valueRange) |
| 499 | : UnaryExponentialFunc<Exp2Op>(state, "exp2", valueRange) |
| 500 | { |
| 501 | } |
| 502 | |
| 503 | static inline bool transformValueRange (float outMin, float outMax, float& inMin, float& inMax) |
| 504 | { |
| 505 | // Limited due to accuracy reasons, should be 0..+inf |
| 506 | const float rangeMin = 0.1f; |
| 507 | const float rangeMax = 10.0f; |
| 508 | |
| 509 | if (outMax < rangeMin || outMin > rangeMax) |
| 510 | return false; // Out of range |
| 511 | |
| 512 | inMin = deFloatLog2(deFloatMax(outMin, rangeMin)); |
| 513 | inMax = deFloatLog2(deFloatMin(outMax, rangeMax)); |
| 514 | |
| 515 | return true; |
| 516 | } |
| 517 | |
| 518 | static inline float evaluateComp (float inVal) |
| 519 | { |
| 520 | return deFloatExp2(inVal); |
| 521 | } |
| 522 | }; |
| 523 | |
| 524 | class Log2Op : public UnaryExponentialFunc<Log2Op> |
| 525 | { |
| 526 | public: |
| 527 | Log2Op (GeneratorState& state, ConstValueRangeAccess valueRange) |
| 528 | : UnaryExponentialFunc<Log2Op>(state, "log2", valueRange) |
| 529 | { |
| 530 | } |
| 531 | |
| 532 | static inline bool transformValueRange (float outMin, float outMax, float& inMin, float& inMax) |
| 533 | { |
| 534 | // Limited due to accuracy reasons, should be -inf..+inf |
| 535 | const float rangeMin = 0.1f; |
| 536 | const float rangeMax = 6.0f; |
| 537 | |
| 538 | if (outMax < rangeMin || outMin > rangeMax) |
| 539 | return false; // Out of range |
| 540 | |
| 541 | inMin = deFloatExp2(deFloatMax(outMin, rangeMin)); |
| 542 | inMax = deFloatExp2(deFloatMin(outMax, rangeMax)); |
| 543 | |
| 544 | return true; |
| 545 | } |
| 546 | |
| 547 | static inline float evaluateComp (float inVal) |
| 548 | { |
| 549 | return deFloatLog2(inVal); |
| 550 | } |
| 551 | }; |
| 552 | |
| 553 | class SqrtOp : public UnaryExponentialFunc<SqrtOp> |
| 554 | { |
| 555 | public: |
| 556 | SqrtOp (GeneratorState& state, ConstValueRangeAccess valueRange) |
| 557 | : UnaryExponentialFunc<SqrtOp>(state, "sqrt", valueRange) |
| 558 | { |
| 559 | } |
| 560 | |
| 561 | static inline bool transformValueRange (float outMin, float outMax, float& inMin, float& inMax) |
| 562 | { |
| 563 | // Limited due to accuracy reasons, should be 0..+inf |
| 564 | const float rangeMin = 0.0f; |
| 565 | const float rangeMax = 4.0f; |
| 566 | |
| 567 | if (outMax < rangeMin || outMin > rangeMax) |
| 568 | return false; // Out of range |
| 569 | |
| 570 | inMin = deFloatMax(outMin, rangeMin); |
| 571 | inMax = deFloatMin(outMax, rangeMax); |
| 572 | |
| 573 | inMin *= inMin; |
| 574 | inMax *= inMax; |
| 575 | |
| 576 | return true; |
| 577 | } |
| 578 | |
| 579 | static inline float evaluateComp (float inVal) |
| 580 | { |
| 581 | return deFloatSqrt(inVal); |
| 582 | } |
| 583 | }; |
| 584 | |
| 585 | class InvSqrtOp : public UnaryExponentialFunc<InvSqrtOp> |
| 586 | { |
| 587 | public: |
| 588 | InvSqrtOp (GeneratorState& state, ConstValueRangeAccess valueRange) |
| 589 | : UnaryExponentialFunc<InvSqrtOp>(state, "inversesqrt", valueRange) |
| 590 | { |
| 591 | } |
| 592 | |
| 593 | static inline bool transformValueRange (float outMin, float outMax, float& inMin, float& inMax) |
| 594 | { |
| 595 | // Limited due to accuracy reasons |
| 596 | const float rangeMin = 0.4f; |
| 597 | const float rangeMax = 3.0f; |
| 598 | |
| 599 | if (outMax < rangeMin || outMin > rangeMax) |
| 600 | return false; // Out of range |
| 601 | |
| 602 | inMax = 1.0f/deFloatMax(outMin, rangeMin); |
| 603 | inMin = 1.0f/deFloatMin(outMax, rangeMax); |
| 604 | |
| 605 | inMin *= inMin; |
| 606 | inMax *= inMax; |
| 607 | |
| 608 | return true; |
| 609 | } |
| 610 | |
| 611 | static inline float evaluateComp (float inVal) |
| 612 | { |
| 613 | return 1.0f/deFloatSqrt(inVal); |
| 614 | } |
| 615 | }; |
| 616 | |
| 617 | } // rsg |
| 618 | |
| 619 | #endif // _RSGBUILTINFUNCTIONS_HPP |