2012-12-28 14:21:30 +00:00
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/*
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2013-08-18 14:16:15 +00:00
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* Copyright 2011-2013 Blender Foundation
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2012-12-28 14:21:30 +00:00
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*
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2013-08-18 14:16:15 +00:00
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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2012-12-28 14:21:30 +00:00
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*
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2013-08-18 14:16:15 +00:00
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* http://www.apache.org/licenses/LICENSE-2.0
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2012-12-28 14:21:30 +00:00
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*
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2013-08-18 14:16:15 +00:00
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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2014-12-25 01:50:24 +00:00
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* limitations under the License.
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2012-12-28 14:21:30 +00:00
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*/
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#include "device.h"
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#include "curves.h"
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#include "mesh.h"
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#include "object.h"
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#include "scene.h"
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#include "util_foreach.h"
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#include "util_map.h"
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#include "util_progress.h"
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#include "util_vector.h"
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CCL_NAMESPACE_BEGIN
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2013-01-15 19:44:41 +00:00
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/* Curve functions */
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void curvebounds(float *lower, float *upper, float3 *p, int dim)
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{
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float *p0 = &p[0].x;
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float *p1 = &p[1].x;
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float *p2 = &p[2].x;
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float *p3 = &p[3].x;
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2013-08-23 12:19:35 +00:00
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2013-01-15 19:44:41 +00:00
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float fc = 0.71f;
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float curve_coef[4];
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curve_coef[0] = p1[dim];
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curve_coef[1] = -fc*p0[dim] + fc*p2[dim];
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curve_coef[2] = 2.0f * fc * p0[dim] + (fc - 3.0f) * p1[dim] + (3.0f - 2.0f * fc) * p2[dim] - fc * p3[dim];
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curve_coef[3] = -fc * p0[dim] + (2.0f - fc) * p1[dim] + (fc - 2.0f) * p2[dim] + fc * p3[dim];
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2013-08-23 12:19:35 +00:00
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2013-01-15 19:44:41 +00:00
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float discroot = curve_coef[2] * curve_coef[2] - 3 * curve_coef[3] * curve_coef[1];
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float ta = -1.0f;
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float tb = -1.0f;
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2014-06-13 19:13:18 +00:00
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2013-01-15 19:44:41 +00:00
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if(discroot >= 0) {
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2014-06-13 19:13:18 +00:00
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discroot = sqrtf(discroot);
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2013-01-15 19:44:41 +00:00
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ta = (-curve_coef[2] - discroot) / (3 * curve_coef[3]);
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tb = (-curve_coef[2] + discroot) / (3 * curve_coef[3]);
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ta = (ta > 1.0f || ta < 0.0f) ? -1.0f : ta;
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tb = (tb > 1.0f || tb < 0.0f) ? -1.0f : tb;
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}
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*upper = max(p1[dim],p2[dim]);
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*lower = min(p1[dim],p2[dim]);
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2014-06-13 19:13:18 +00:00
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2013-01-15 19:44:41 +00:00
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float exa = p1[dim];
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float exb = p2[dim];
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2014-06-13 19:13:18 +00:00
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2013-01-15 19:44:41 +00:00
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if(ta >= 0.0f) {
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2014-06-13 19:13:18 +00:00
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float t2 = ta * ta;
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float t3 = t2 * ta;
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2013-01-15 19:44:41 +00:00
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exa = curve_coef[3] * t3 + curve_coef[2] * t2 + curve_coef[1] * ta + curve_coef[0];
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}
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if(tb >= 0.0f) {
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2014-06-13 19:13:18 +00:00
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float t2 = tb * tb;
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float t3 = t2 * tb;
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2013-01-15 19:44:41 +00:00
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exb = curve_coef[3] * t3 + curve_coef[2] * t2 + curve_coef[1] * tb + curve_coef[0];
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}
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2014-06-13 19:13:18 +00:00
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2013-01-15 19:44:41 +00:00
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*upper = max(*upper, max(exa,exb));
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*lower = min(*lower, min(exa,exb));
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}
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2012-12-28 14:21:30 +00:00
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/* Hair System Manager */
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CurveSystemManager::CurveSystemManager()
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{
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primitive = CURVE_LINE_SEGMENTS;
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2013-08-18 13:41:53 +00:00
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curve_shape = CURVE_THICK;
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2012-12-28 14:21:30 +00:00
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line_method = CURVE_CORRECTED;
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2013-01-15 19:44:41 +00:00
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triangle_method = CURVE_CAMERA_TRIANGLES;
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2012-12-28 14:21:30 +00:00
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resolution = 3;
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2013-01-15 19:44:41 +00:00
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subdivisions = 3;
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2012-12-28 14:21:30 +00:00
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2013-04-15 21:38:31 +00:00
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minimum_width = 0.0f;
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maximum_width = 0.0f;
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2012-12-28 14:21:30 +00:00
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use_curves = true;
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use_encasing = true;
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use_backfacing = false;
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use_tangent_normal_geometry = false;
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need_update = true;
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need_mesh_update = false;
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}
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CurveSystemManager::~CurveSystemManager()
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{
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}
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void CurveSystemManager::device_update(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress)
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{
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if(!need_update)
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return;
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device_free(device, dscene);
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progress.set_status("Updating Hair settings", "Copying Hair settings to device");
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2014-05-04 16:19:08 +00:00
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KernelCurves *kcurve = &dscene->data.curve;
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2012-12-28 14:21:30 +00:00
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kcurve->curveflags = 0;
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2013-01-15 19:44:41 +00:00
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if(use_curves) {
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if(primitive == CURVE_SEGMENTS || primitive == CURVE_RIBBONS)
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kcurve->curveflags |= CURVE_KN_INTERPOLATE;
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if(primitive == CURVE_RIBBONS)
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kcurve->curveflags |= CURVE_KN_RIBBONS;
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if(line_method == CURVE_ACCURATE)
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kcurve->curveflags |= CURVE_KN_ACCURATE;
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2013-12-14 12:11:44 +00:00
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else if(line_method == CURVE_CORRECTED)
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2013-01-15 19:44:41 +00:00
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kcurve->curveflags |= CURVE_KN_INTERSECTCORRECTION;
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if(use_tangent_normal_geometry)
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kcurve->curveflags |= CURVE_KN_TRUETANGENTGNORMAL;
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if(use_backfacing)
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kcurve->curveflags |= CURVE_KN_BACKFACING;
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if(use_encasing)
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kcurve->curveflags |= CURVE_KN_ENCLOSEFILTER;
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2013-04-15 21:38:31 +00:00
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kcurve->minimum_width = minimum_width;
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kcurve->maximum_width = maximum_width;
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2013-01-15 19:44:41 +00:00
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kcurve->subdivisions = subdivisions;
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}
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2012-12-28 14:21:30 +00:00
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if(progress.get_cancel()) return;
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need_update = false;
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}
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void CurveSystemManager::device_free(Device *device, DeviceScene *dscene)
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{
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}
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bool CurveSystemManager::modified(const CurveSystemManager& CurveSystemManager)
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{
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2013-08-18 13:41:53 +00:00
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return !(curve_shape == CurveSystemManager.curve_shape &&
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line_method == CurveSystemManager.line_method &&
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2012-12-28 14:21:30 +00:00
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primitive == CurveSystemManager.primitive &&
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use_encasing == CurveSystemManager.use_encasing &&
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use_tangent_normal_geometry == CurveSystemManager.use_tangent_normal_geometry &&
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2013-04-15 21:38:31 +00:00
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minimum_width == CurveSystemManager.minimum_width &&
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maximum_width == CurveSystemManager.maximum_width &&
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2012-12-28 14:21:30 +00:00
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use_backfacing == CurveSystemManager.use_backfacing &&
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triangle_method == CurveSystemManager.triangle_method &&
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resolution == CurveSystemManager.resolution &&
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use_curves == CurveSystemManager.use_curves &&
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2013-01-15 19:44:41 +00:00
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subdivisions == CurveSystemManager.subdivisions);
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2012-12-28 14:21:30 +00:00
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}
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bool CurveSystemManager::modified_mesh(const CurveSystemManager& CurveSystemManager)
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{
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return !(primitive == CurveSystemManager.primitive &&
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2013-08-18 13:41:53 +00:00
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curve_shape == CurveSystemManager.curve_shape &&
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2012-12-28 14:21:30 +00:00
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triangle_method == CurveSystemManager.triangle_method &&
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resolution == CurveSystemManager.resolution &&
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2013-08-18 13:41:53 +00:00
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use_curves == CurveSystemManager.use_curves);
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2012-12-28 14:21:30 +00:00
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}
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void CurveSystemManager::tag_update(Scene *scene)
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{
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need_update = true;
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}
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void CurveSystemManager::tag_update_mesh()
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{
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need_mesh_update = true;
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}
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CCL_NAMESPACE_END
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