diff options
author | Sergey Sharybin <sergey.vfx@gmail.com> | 2015-07-18 23:09:20 +0300 |
---|---|---|
committer | Sergey Sharybin <sergey.vfx@gmail.com> | 2015-07-18 23:09:20 +0300 |
commit | 7d10798af22f683a8f55a8c361ad5676bd4160d2 (patch) | |
tree | ad762edb4d4489ec03cc88ea2f98da8c3eb9894e /intern/cycles/kernel | |
parent | 2f15a1f66e3092158d330db97a33dc8d087ca053 (diff) |
Cycles: Add voxel texture sampler shader node
The idea of this node is to sampling of 3D voxels at a given coordinate
supporting different mapping strategies (world space mapping, object
local space etc).
Currently not in use, it's a preparation step for supporting point density
textures.
Diffstat (limited to 'intern/cycles/kernel')
-rw-r--r-- | intern/cycles/kernel/CMakeLists.txt | 1 | ||||
-rw-r--r-- | intern/cycles/kernel/shaders/CMakeLists.txt | 1 | ||||
-rw-r--r-- | intern/cycles/kernel/shaders/node_voxel_texture.osl | 47 | ||||
-rw-r--r-- | intern/cycles/kernel/svm/svm.h | 6 | ||||
-rw-r--r-- | intern/cycles/kernel/svm/svm_types.h | 8 | ||||
-rw-r--r-- | intern/cycles/kernel/svm/svm_voxel.h | 64 |
6 files changed, 126 insertions, 1 deletions
diff --git a/intern/cycles/kernel/CMakeLists.txt b/intern/cycles/kernel/CMakeLists.txt index d0279b27046..b44e91751ad 100644 --- a/intern/cycles/kernel/CMakeLists.txt +++ b/intern/cycles/kernel/CMakeLists.txt @@ -125,6 +125,7 @@ set(SRC_SVM_HEADERS svm/svm_value.h svm/svm_vector_transform.h svm/svm_voronoi.h + svm/svm_voxel.h svm/svm_wave.h ) diff --git a/intern/cycles/kernel/shaders/CMakeLists.txt b/intern/cycles/kernel/shaders/CMakeLists.txt index 0b735ede701..81931463cad 100644 --- a/intern/cycles/kernel/shaders/CMakeLists.txt +++ b/intern/cycles/kernel/shaders/CMakeLists.txt @@ -74,6 +74,7 @@ set(SRC_OSL node_vector_transform.osl node_velvet_bsdf.osl node_voronoi_texture.osl + node_voxel_texture.osl node_wavelength.osl node_blackbody.osl node_wave_texture.osl diff --git a/intern/cycles/kernel/shaders/node_voxel_texture.osl b/intern/cycles/kernel/shaders/node_voxel_texture.osl new file mode 100644 index 00000000000..e45af62220f --- /dev/null +++ b/intern/cycles/kernel/shaders/node_voxel_texture.osl @@ -0,0 +1,47 @@ +/* + * Copyright 2011-2015 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. + */ + +#include "stdosl.h" + +shader node_voxel_texture( + string filename = "", + string interpolation = "linear", + int use_mapping = 0, + matrix mapping = matrix(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0), + point Vector = P, + output float Density = 0, + output color Color = 0) +{ + point p = Vector; + if (use_mapping) { + p = transform(mapping, p); + } + else { + p = transform("object", Vector); + matrix tfm; + if (getattribute("geom:generated_transform", tfm)) + p = transform(tfm, p); + } + if(p[0] < 0.0 || p[1] < 0.0 || p[2] < 0.0 || + p[0] > 1.0 || p[1] > 1.0 || p[2] > 1.0) + { + Density = 0; + Color = color(0, 0, 0); + } + else { + Color = (color)texture3d(filename, p, "wrap", "periodic", "interp", interpolation, "alpha", Density); + } +} diff --git a/intern/cycles/kernel/svm/svm.h b/intern/cycles/kernel/svm/svm.h index 15ac6519780..5ac21e44f75 100644 --- a/intern/cycles/kernel/svm/svm.h +++ b/intern/cycles/kernel/svm/svm.h @@ -179,6 +179,7 @@ CCL_NAMESPACE_END #include "svm_checker.h" #include "svm_brick.h" #include "svm_vector_transform.h" +#include "svm_voxel.h" CCL_NAMESPACE_BEGIN @@ -446,6 +447,11 @@ ccl_device_noinline void svm_eval_nodes(KernelGlobals *kg, ShaderData *sd, Shade svm_node_blackbody(kg, sd, stack, node.y, node.z); break; # endif /* __EXTRA_NODES__ */ +# if NODES_FEATURE(NODE_FEATURE_VOLUME) + case NODE_TEX_VOXEL: + svm_node_tex_voxel(kg, sd, stack, node, &offset); + break; +# endif /* NODES_FEATURE(NODE_FEATURE_VOLUME) */ #endif /* NODES_GROUP(NODE_GROUP_LEVEL_3) */ case NODE_END: return; diff --git a/intern/cycles/kernel/svm/svm_types.h b/intern/cycles/kernel/svm/svm_types.h index 009e91192eb..641d30a5737 100644 --- a/intern/cycles/kernel/svm/svm_types.h +++ b/intern/cycles/kernel/svm/svm_types.h @@ -125,7 +125,8 @@ typedef enum NodeType { NODE_TANGENT, NODE_NORMAL_MAP, NODE_HAIR_INFO, - NODE_UVMAP + NODE_UVMAP, + NODE_TEX_VOXEL, } NodeType; typedef enum NodeAttributeType { @@ -349,6 +350,11 @@ typedef enum NodeBumpOffset { NODE_BUMP_OFFSET_DY, } NodeBumpOffset; +typedef enum NodeTexVoxelSpace { + NODE_TEX_VOXEL_SPACE_OBJECT = 0, + NODE_TEX_VOXEL_SPACE_WORLD = 1, +} NodeTexVoxelSpace; + typedef enum ShaderType { SHADER_TYPE_SURFACE, SHADER_TYPE_VOLUME, diff --git a/intern/cycles/kernel/svm/svm_voxel.h b/intern/cycles/kernel/svm/svm_voxel.h new file mode 100644 index 00000000000..8752307472f --- /dev/null +++ b/intern/cycles/kernel/svm/svm_voxel.h @@ -0,0 +1,64 @@ +/* + * Copyright 2011-2015 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 + +/* TODO(sergey): Think of making it more generic volume-type attribute + * sampler. + */ +ccl_device void svm_node_tex_voxel(KernelGlobals *kg, + ShaderData *sd, + float *stack, + uint4 node, + int *offset) +{ + int id = node.y; + uint co_offset, density_out_offset, color_out_offset, space; + decode_node_uchar4(node.z, &co_offset, &density_out_offset, &color_out_offset, &space); + float3 co = stack_load_float3(stack, co_offset); + if(space == NODE_TEX_VOXEL_SPACE_OBJECT) { + co = volume_normalized_position(kg, sd, co); + } + else { + kernel_assert(space == NODE_TEX_VOXEL_SPACE_WORLD); + Transform tfm; + tfm.x = read_node_float(kg, offset); + tfm.y = read_node_float(kg, offset); + tfm.z = read_node_float(kg, offset); + tfm.w = read_node_float(kg, offset); + co = transform_point(&tfm, co); + } + if(co.x < 0.0f || co.y < 0.0f || co.z < 0.0f || + co.x > 1.0f || co.y > 1.0f || co.z > 1.0f) + { + if (stack_valid(density_out_offset)) + stack_store_float(stack, density_out_offset, 0.0f); + if (stack_valid(color_out_offset)) + stack_store_float3(stack, color_out_offset, make_float3(0.0f, 0.0f, 0.0f)); + return; + } +#ifdef __KERNEL_GPU__ + float4 r = make_float4(0.0f, 0.0f, 0.0f, 0.0f); +#else + float4 r = kernel_tex_image_interp_3d(id, co.x, co.y, co.z); +#endif + if (stack_valid(density_out_offset)) + stack_store_float(stack, density_out_offset, r.w); + if (stack_valid(color_out_offset)) + stack_store_float3(stack, color_out_offset, make_float3(r.x, r.y, r.z)); +} + +CCL_NAMESPACE_END |