101 lines
3.4 KiB
C#
101 lines
3.4 KiB
C#
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/*
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---------------------------------------------------------------------------
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Open Asset Import Library (ASSIMP)
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---------------------------------------------------------------------------
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Copyright (c) 2006-2010, ASSIMP Development Team
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All rights reserved.
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Redistribution and use of this software in source and binary forms,
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with or without modification, are permitted provided that the following
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conditions are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the
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following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other
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materials provided with the distribution.
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* Neither the name of the ASSIMP team, nor the names of its
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contributors may be used to endorse or promote products
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derived from this software without specific prior
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written permission of the ASSIMP Development Team.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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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
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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---------------------------------------------------------------------------
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*/
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using Microsoft.DirectX;
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namespace Assimp.Viewer {
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public class Camera {
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public Camera () {
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vPos = new Vector3(0.0f,0.0f,-10.0f);
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vLookAt = new Vector3(0.0f, 0.0f, 1.0f);
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vUp = new Vector3(0.0f,1.0f,0.0f);
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vRight = new Vector3(0.0f,1.0f,0.0f);
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}
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// position of the camera
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public Vector3 vPos;
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// up-vector of the camera
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public Vector3 vUp;
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// camera's looking point is vPos + vLookAt
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public Vector3 vLookAt;
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// right vector of the camera
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public Vector3 vRight;
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// Equation
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// (vRight ^ vUp) - vLookAt == 0
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// needn't apply
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public Matrix GetMatrix() {
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vLookAt.Normalize();
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vRight = Vector3.Cross(vUp, vLookAt);
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vRight.Normalize();
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vUp = Vector3.Cross(vLookAt, vRight);
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vUp.Normalize();
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var view = Matrix.Identity;
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view.M11 = vRight.X;
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view.M12 = vUp.X;
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view.M13 = vLookAt.X;
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view.M14 = 0.0f;
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view.M21 = vRight.Y;
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view.M22 = vUp.Y;
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view.M23 = vLookAt.Y;
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view.M24 = 0.0f;
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view.M31 = vRight.Z;
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view.M32 = vUp.Z;
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view.M33 = vLookAt.Z;
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view.M34 = 0.0f;
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view.M41 = -Vector3.Dot(vPos, vRight);
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view.M42 = -Vector3.Dot(vPos, vUp);
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view.M43 = -Vector3.Dot(vPos, vLookAt);
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view.M44 = 1.0f;
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return view;
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}
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}
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}
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