diff options
Diffstat (limited to 'intern/cycles/kernel/svm/svm_bump.h')
-rw-r--r-- | intern/cycles/kernel/svm/svm_bump.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/intern/cycles/kernel/svm/svm_bump.h b/intern/cycles/kernel/svm/svm_bump.h new file mode 100644 index 00000000000..04a8c7b64e5 --- /dev/null +++ b/intern/cycles/kernel/svm/svm_bump.h @@ -0,0 +1,54 @@ +/* + * Copyright 2011-2016 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 + +/* Bump Eval Nodes */ + +ccl_device void svm_node_enter_bump_eval(KernelGlobals *kg, ShaderData *sd, float *stack, uint offset) +{ + /* save state */ + stack_store_float3(stack, offset+0, ccl_fetch(sd, P)); + stack_store_float3(stack, offset+3, ccl_fetch(sd, dP).dx); + stack_store_float3(stack, offset+6, ccl_fetch(sd, dP).dy); + + /* set state as if undisplaced */ + const AttributeDescriptor desc = find_attribute(kg, sd, ATTR_STD_POSITION_UNDISPLACED); + + if(desc.offset != ATTR_STD_NOT_FOUND) { + float3 P, dPdx, dPdy; + P = primitive_attribute_float3(kg, sd, desc, &dPdx, &dPdy); + + object_position_transform(kg, sd, &P); + object_dir_transform(kg, sd, &dPdx); + object_dir_transform(kg, sd, &dPdy); + + ccl_fetch(sd, P) = P; + ccl_fetch(sd, dP).dx = dPdx; + ccl_fetch(sd, dP).dy = dPdy; + } +} + +ccl_device void svm_node_leave_bump_eval(KernelGlobals *kg, ShaderData *sd, float *stack, uint offset) +{ + /* restore state */ + ccl_fetch(sd, P) = stack_load_float3(stack, offset+0); + ccl_fetch(sd, dP).dx = stack_load_float3(stack, offset+3); + ccl_fetch(sd, dP).dy = stack_load_float3(stack, offset+6); +} + +CCL_NAMESPACE_END + |