125 lines
3.9 KiB
C++
125 lines
3.9 KiB
C++
/****************************************************************************
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Copyright (c) 2011-2013,WebJet Business Division,CYOU
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http://www.genesis-3d.com.cn
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#include "stdneb.h"
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#include "boxbuilder.h"
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namespace MeshBuilder
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{
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using namespace Math;
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void BoxBuilder::setPositions(ubyte* buffer, SizeT vertexSize, SizeT posBias, float sideX, float sideY, float sideZ, const float3& center)
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{
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n_assert(NULL != buffer);
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n_assert(posBias <= (vertexSize - (SizeT)sizeof(float3)));
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float half_x = sideX * 0.5f;
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float half_y = sideY * 0.5f;
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float half_z = sideZ * 0.5f;
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elem_iterator<float3> elem(buffer + posBias, vertexSize);
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elem->set(center.x()-half_x, center.y()+half_y, center.z()+half_z);
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++elem;
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elem->set(center.x()+half_x, center.y()+half_y, center.z()+half_z);
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++elem;
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elem->set(center.x()-half_x, center.y()-half_y, center.z()+half_z);
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++elem;
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elem->set(center.x()+half_x, center.y()-half_y, center.z()+half_z);
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++elem;
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elem->set(center.x()-half_x, center.y()+half_y, center.z()-half_z);
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++elem;
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elem->set(center.x()+half_x, center.y()+half_y, center.z()-half_z);
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++elem;
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elem->set(center.x()-half_x, center.y()-half_y, center.z()-half_z);
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++elem;
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elem->set(center.x()+half_x, center.y()-half_y, center.z()-half_z);
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}
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void setNormal(elem_iterator<float3>& norm_it, const elem_iterator_const<float3>& pos_it, int index_0, int index_1)
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{
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const float3* point0 = pos_it.get(index_0);
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const float3* point1 = pos_it.get(index_1);
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float3 normal = *point0 - *point1;
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normal.normalise();
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*norm_it.get(index_0) = normal;
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*norm_it.get(index_1) = - normal;
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}
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void BoxBuilder::setNormals(ubyte* buffer, SizeT vertexSize, SizeT normalBias, const ubyte* posBuffer, SizeT posBufferVertexSize, SizeT posBias)
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{
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elem_iterator<float3> norm_it(buffer + normalBias, vertexSize);
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elem_iterator_const<float3> pos_it(posBuffer + posBias, posBufferVertexSize);
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setNormal(norm_it, pos_it, 0, 7);
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setNormal(norm_it, pos_it, 1, 6);
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setNormal(norm_it, pos_it, 2, 5);
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setNormal(norm_it, pos_it, 3, 4);
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}
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void BoxBuilder::SetIndices(ushort* buffer)
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{
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// indices: {0,2,1; 1,2,3} {5,7,4; 4,7,6} {4,0,5; 5,0,1} {2,6,3; 3,6,7} {4,6,0; 0,6,2} {1,3,5; 5,3,7}
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n_assert(NULL != buffer);
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buffer[0] = 0;
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buffer[1] = 2;
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buffer[2] = 1;
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buffer[3] = 1;
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buffer[4] = 2;
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buffer[5] = 3;
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buffer[6] = 5;
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buffer[7] = 7;
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buffer[8] = 4;
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buffer[9] = 4;
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buffer[10] = 7;
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buffer[11] = 6;
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buffer[12] = 4;
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buffer[13] = 0;
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buffer[14] = 5;
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buffer[15] = 5;
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buffer[16] = 0;
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buffer[17] = 1;
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buffer[18] = 2;
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buffer[19] = 6;
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buffer[20] = 3;
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buffer[21] = 3;
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buffer[22] = 6;
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buffer[23] = 7;
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buffer[24] = 4;
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buffer[25] = 6;
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buffer[26] = 0;
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buffer[27] = 0;
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buffer[28] = 6;
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buffer[29] = 2;
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buffer[30] = 1;
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buffer[31] = 3;
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buffer[32] = 5;
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buffer[33] = 5;
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buffer[34] = 3;
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buffer[35] = 7;
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}
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}
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