diff options
author | Thomas Dinges <blender@dingto.org> | 2013-05-20 19:58:37 +0400 |
---|---|---|
committer | Thomas Dinges <blender@dingto.org> | 2013-05-20 19:58:37 +0400 |
commit | 3758193c18a886faa5bb803dd378f24866e793e5 (patch) | |
tree | 9d013e4f7008845a3a2b04539396bb2e2e341888 /intern/cycles/kernel/svm | |
parent | 38dc85f296a27a5641d296c8f41834db41dac18b (diff) |
Cycles / Wireframe node:
* Added a wireframe node (Input category) to get access to Mesh wireframe data.
The thickness can be controlled via a "Size" parameter, and is available in world units (default) and screen pixel size.
* Only the triangulated mesh is available now, quads is for later.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/More#Wireframe
Render and Example file:
http://www.pasteall.org/pic/show.php?id=51731
http://www.pasteall.org/blend/21510
Diffstat (limited to 'intern/cycles/kernel/svm')
-rw-r--r-- | intern/cycles/kernel/svm/svm.h | 4 | ||||
-rw-r--r-- | intern/cycles/kernel/svm/svm_types.h | 1 | ||||
-rw-r--r-- | intern/cycles/kernel/svm/svm_wireframe.h | 97 |
3 files changed, 102 insertions, 0 deletions
diff --git a/intern/cycles/kernel/svm/svm.h b/intern/cycles/kernel/svm/svm.h index 22172420aba..8f1d2aa0e16 100644 --- a/intern/cycles/kernel/svm/svm.h +++ b/intern/cycles/kernel/svm/svm.h @@ -151,6 +151,7 @@ CCL_NAMESPACE_END #include "svm_convert.h" #include "svm_displace.h" #include "svm_fresnel.h" +#include "svm_wireframe.h" #include "svm_camera.h" #include "svm_geometry.h" #include "svm_hsv.h" @@ -357,6 +358,9 @@ __device_noinline void svm_eval_nodes(KernelGlobals *kg, ShaderData *sd, ShaderT case NODE_LAYER_WEIGHT: svm_node_layer_weight(sd, stack, node); break; + case NODE_WIREFRAME: + svm_node_wireframe(kg, sd, stack, node.y, node.z, node.w); + break; #ifdef __EXTRA_NODES__ case NODE_SET_DISPLACEMENT: svm_node_set_displacement(sd, stack, node.y); diff --git a/intern/cycles/kernel/svm/svm_types.h b/intern/cycles/kernel/svm/svm_types.h index 2cf3ccbe575..de52844194c 100644 --- a/intern/cycles/kernel/svm/svm_types.h +++ b/intern/cycles/kernel/svm/svm_types.h @@ -51,6 +51,7 @@ typedef enum NodeType { NODE_ATTR, NODE_CONVERT, NODE_FRESNEL, + NODE_WIREFRAME, NODE_EMISSION_WEIGHT, NODE_TEX_GRADIENT, NODE_TEX_VORONOI, diff --git a/intern/cycles/kernel/svm/svm_wireframe.h b/intern/cycles/kernel/svm/svm_wireframe.h new file mode 100644 index 00000000000..efe09051403 --- /dev/null +++ b/intern/cycles/kernel/svm/svm_wireframe.h @@ -0,0 +1,97 @@ +/* + * Adapted from Open Shading Language with this license: + * + * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al. + * All Rights Reserved. + * + * Modifications Copyright 2013, Blender Foundation. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of Sony Pictures Imageworks nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +CCL_NAMESPACE_BEGIN + +/* Wireframe Node */ + +__device void svm_node_wireframe(KernelGlobals *kg, ShaderData *sd, float *stack, uint in_size, uint out_fac, uint use_pixel_size) +{ + /* Input Data */ + float size = stack_load_float(stack, in_size); + int pixel_size = (int)use_pixel_size; + + /* Output */ + float f = 0.0f; + + /* Calculate wireframe */ +#ifdef __HAIR__ + if (sd->segment == ~0) { +#else + { +#endif + float3 Co[3]; + float pixelwidth = 1.0f; + + /* Triangles */ + float np = 3; + + triangle_vertices(kg, sd->prim, Co); + + if(!(sd->flag & SD_TRANSFORM_APPLIED)) { + object_position_transform(kg, sd, &Co[0]); + object_position_transform(kg, sd, &Co[1]); + object_position_transform(kg, sd, &Co[2]); + } + + if(pixel_size) { + // Project the derivatives of P to the viewing plane defined + // by I so we have a measure of how big is a pixel at this point + float pixelwidth_x = len(sd->dP.dx - dot(sd->dP.dx, sd->I) * sd->I); + float pixelwidth_y = len(sd->dP.dy - dot(sd->dP.dy, sd->I) * sd->I); + // Take the average of both axis' length + pixelwidth = (pixelwidth_x + pixelwidth_y) * 0.5f; + } + + // Use half the width as the neighbor face will render the + // other half. And take the square for fast comparison + pixelwidth *= 0.5f * size; + pixelwidth *= pixelwidth; + for (int i = 0; i < np; i++) { + int i2 = i ? i - 1 : np - 1; + float3 dir = sd->P - Co[i]; + float3 edge = Co[i] - Co[i2]; + float3 crs = cross(edge, dir); + // At this point dot(crs, crs) / dot(edge, edge) is + // the square of area / length(edge) == square of the + // distance to the edge. + if (dot(crs, crs) < (dot(edge, edge) * pixelwidth)) + f = 1.0f; + } + } + + if (stack_valid(out_fac)) + stack_store_float(stack, out_fac, f); +} + +CCL_NAMESPACE_END + |