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Diffstat (limited to 'intern/cycles/kernel/shaders/oslutil.h')
-rw-r--r-- | intern/cycles/kernel/shaders/oslutil.h | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/intern/cycles/kernel/shaders/oslutil.h b/intern/cycles/kernel/shaders/oslutil.h deleted file mode 100644 index d48bfa4a665..00000000000 --- a/intern/cycles/kernel/shaders/oslutil.h +++ /dev/null @@ -1,101 +0,0 @@ -/* - * Adapted from Open Shading Language with this license: - * - * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al. - * All Rights Reserved. - * - * Modifications Copyright 2011, 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. - */ - -#ifndef CCL_OSLUTIL_H -#define CCL_OSLUTIL_H - -// Return wireframe opacity factor [0, 1] given a geometry type in -// ("triangles", "polygons" or "patches"), and a line_width in raster -// or world space depending on the last (raster) boolean argument. -// -float wireframe(string edge_type, float line_width, int raster) -{ - // ray differentials are so big in diffuse context that this function would always return "wire" - if (raytype("path:diffuse")) - return 0.0; - - int np = 0; - point p[64]; - float pixelWidth = 1; - - if (edge_type == "triangles") { - np = 3; - if (!getattribute("geom:trianglevertices", p)) - return 0.0; - } - else if (edge_type == "polygons" || edge_type == "patches") { - getattribute("geom:numpolyvertices", np); - if (np < 3 || !getattribute("geom:polyvertices", p)) - return 0.0; - } - - if (raster) { - // 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 pixelWidthX = length(Dx(P) - dot(Dx(P), I) * I); - float pixelWidthY = length(Dy(P) - dot(Dy(P), I) * I); - // Take the average of both axis' length - pixelWidth = (pixelWidthX + pixelWidthY) / 2; - } - - // Use half the width as the neighbor face will render the - // other half. And take the square for fast comparison - pixelWidth *= 0.5 * line_width; - pixelWidth *= pixelWidth; - for (int i = 0; i < np; i++) { - int i2 = i ? i - 1 : np - 1; - vector dir = P - p[i]; - vector edge = p[i] - p[i2]; - vector 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)) - return 1; - } - return 0; -} - -float wireframe(string edge_type, float line_width) -{ - return wireframe(edge_type, line_width, 1); -} -float wireframe(string edge_type) -{ - return wireframe(edge_type, 1.0, 1); -} -float wireframe() -{ - return wireframe("polygons", 1.0, 1); -} - -#endif /* CCL_OSLUTIL_H */ |