116 lines
5.2 KiB
C++
116 lines
5.2 KiB
C++
/**************************************************************************************/
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/* */
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/* Visualization Library */
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/* http://visualizationlibrary.org */
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/* */
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/* Copyright (c) 2005-2020, Michele Bosi */
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/* All rights reserved. */
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/* */
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/* Redistribution and use in source and binary forms, with or without modification, */
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/* are permitted provided that the following conditions are met: */
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/* */
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/* - Redistributions of source code must retain the above copyright notice, this */
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/* list of conditions and the following disclaimer. */
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/* */
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/* - Redistributions in binary form must reproduce the above copyright notice, this */
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/* list of conditions and the following disclaimer in the documentation and/or */
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/* other materials provided with the distribution. */
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/* */
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/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND */
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/* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED */
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/* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */
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/* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR */
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/* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES */
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/* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; */
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/* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON */
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/* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
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/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS */
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/* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
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/* */
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/**************************************************************************************/
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#ifndef EdgeUpdateCallback_INCLUDE_ONCE
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#define EdgeUpdateCallback_INCLUDE_ONCE
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#include <vlGraphics/Actor.hpp>
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#include <vlGraphics/EdgeExtractor.hpp>
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#include <vlGraphics/Geometry.hpp>
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#include <vlGraphics/Camera.hpp>
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namespace vl
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{
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//! The EdgeUpdateCallback class updates at every frame the edges of an Actor for the purpose of edge-enhancement.
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//! \sa EdgeExtractor
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class EdgeUpdateCallback: public ActorEventCallback
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{
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VL_INSTRUMENT_CLASS(vl::EdgeUpdateCallback, ActorEventCallback)
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public:
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EdgeUpdateCallback(): mShowCreases(true)
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{
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VL_DEBUG_SET_OBJECT_NAME()
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}
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EdgeUpdateCallback(const std::vector<EdgeExtractor::Edge>& edge): mEdges(edge), mShowCreases(false)
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{
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VL_DEBUG_SET_OBJECT_NAME()
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}
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//! If \p true only the edges forming the silhouette of an object will be rendered.
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void setShowCreases(bool sonly) { mShowCreases = sonly; }
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//! If \p true only the edges forming the silhouette of an object will be rendered.
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bool showCreases() const { return mShowCreases; }
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virtual void onActorDelete(Actor*) {}
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virtual void onActorRenderStarted(Actor* act, real /*frame_clock*/, const Camera* cam, Renderable* renderable, const Shader*, int pass)
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{
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if (pass != 0)
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return;
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fmat4 vmat = (fmat4)cam->viewMatrix();
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if (act->transform())
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vmat = vmat * (fmat4)act->transform()->worldMatrix();
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fmat4 nmat = vmat.as3x3();
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nmat = nmat.getInverse().transpose();
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ref<Geometry> geom = cast<Geometry>(renderable);
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ref<ArrayFloat3> vert_array = cast<ArrayFloat3>(geom->vertexArray());
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// VL_CHECK(vert_array->size() == edges().size()*2);
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for(unsigned i=0; i<edges().size(); ++i)
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{
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bool insert_edge = edges()[i].isCrease() && showCreases();
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if (!insert_edge)
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{
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fvec3 v1 = vmat * edges()[i].vertex1();
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fvec3 v2 = vmat * edges()[i].vertex2();
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fvec3 v = ((v1+v2) * 0.5f).normalize();
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fvec3 n1 = nmat * edges()[i].normal1();
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fvec3 n2 = nmat * edges()[i].normal2();
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insert_edge = dot(n1, v) * dot(n2, v) < 0;
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}
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if ( insert_edge )
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{
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vert_array->at(i*2+0) = edges()[i].vertex1();
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vert_array->at(i*2+1) = edges()[i].vertex2();
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}
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else
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{
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// degenerate
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vert_array->at(i*2+0) = vert_array->at(i*2+1);
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}
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}
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}
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const std::vector<EdgeExtractor::Edge>& edges() const { return mEdges; }
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std::vector<EdgeExtractor::Edge>& edges() { return mEdges; }
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private:
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std::vector<EdgeExtractor::Edge> mEdges;
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bool mShowCreases;
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};
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}
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#endif
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