69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
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/****************************************************************************
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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 "parallelogrambuilder.h"
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namespace MeshBuilder
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{
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using namespace Math;
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const Math::float3 ParallelogramBuilder::sDefaultNormal(0.0f, 0.0f, 1.0f);
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void ParallelogramBuilder::Set(void* vertices, size_t vertex_size, const float3& top, const float3& right, const float3& center,
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size_t position_bias)
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{
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n_assert(vertex_size >= sizeof(float3));
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elem_iterator<float3> elem(_bias_in_bytes(vertices, position_bias), vertex_size);
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*(elem) = center + top - right;//0
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*(++elem) = center + top + right;//1
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*(++elem) = center - top - right;//2
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*(++elem) = center - top + right;//3
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}
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void ParallelogramBuilder::Set(void* vertices, size_t vertex_size, const float3& top, const float3& right, const float3& center,
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size_t position_bias, size_t normal_bias)
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{
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n_assert(vertex_size >= sizeof(float3) * 2);
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Set(vertices, vertex_size, top, right, center, position_bias);
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float3 normal = right.crossProduct(top);
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normal = float3::normalize(normal);
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elem_iterator<float3> normal_elem(_bias_in_bytes(vertices, normal_bias), vertex_size);
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*normal_elem = normal;
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*(++normal_elem) = normal;
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*(++normal_elem) = normal;
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*(++normal_elem) = normal;
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}
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void ParallelogramBuilder::SetIndices(ushort* buffer)
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{
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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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}
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}
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