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author | OmarSquircleArt <omar.squircleart@gmail.com> | 2019-08-13 17:29:32 +0300 |
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committer | OmarSquircleArt <omar.squircleart@gmail.com> | 2019-08-13 17:38:56 +0300 |
commit | 71641ab56d0f0cb52c301b83ff499699029fa032 (patch) | |
tree | 18029c373c2ec777e8c151e888bc708aa2537988 /intern/cycles/kernel/svm/svm_map_range.h | |
parent | aef08fda3ade2d0223b77d4c9c0dd5e9fcabe7b2 (diff) |
Shading: Add Map Range node to Cycles and EEVEE.
This patch adds a new Map Range node that linearly remaps an input
value from a range to another. This node is similar to the compositor's
Map Range node.
Reviewers: brecht, JacquesLucke
Differential Revision: https://developer.blender.org/D5471
Diffstat (limited to 'intern/cycles/kernel/svm/svm_map_range.h')
-rw-r--r-- | intern/cycles/kernel/svm/svm_map_range.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/intern/cycles/kernel/svm/svm_map_range.h b/intern/cycles/kernel/svm/svm_map_range.h new file mode 100644 index 00000000000..5d542e959d1 --- /dev/null +++ b/intern/cycles/kernel/svm/svm_map_range.h @@ -0,0 +1,54 @@ +/* + * Copyright 2011-2013 Blender Foundation + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +CCL_NAMESPACE_BEGIN + +/* Map Range Node */ + +ccl_device void svm_node_map_range(KernelGlobals *kg, + ShaderData *sd, + float *stack, + uint value_stack_offset, + uint parameters_stack_offsets, + uint result_stack_offset, + int *offset) +{ + uint from_min_stack_offset, from_max_stack_offset, to_min_stack_offset, to_max_stack_offset; + decode_node_uchar4(parameters_stack_offsets, + &from_min_stack_offset, + &from_max_stack_offset, + &to_min_stack_offset, + &to_max_stack_offset); + + uint4 defaults = read_node(kg, offset); + + float value = stack_load_float(stack, value_stack_offset); + float from_min = stack_load_float_default(stack, from_min_stack_offset, defaults.x); + float from_max = stack_load_float_default(stack, from_max_stack_offset, defaults.y); + float to_min = stack_load_float_default(stack, to_min_stack_offset, defaults.z); + float to_max = stack_load_float_default(stack, to_max_stack_offset, defaults.w); + + float result; + if (from_max != from_min) { + result = to_min + ((value - from_min) / (from_max - from_min)) * (to_max - to_min); + } + else { + result = 0.0f; + } + stack_store_float(stack, result_stack_offset, result); +} + +CCL_NAMESPACE_END |