81 lines
3 KiB
C
81 lines
3 KiB
C
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file look_at_src.h
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* @author drose
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* @date 1999-09-25
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*/
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// These functions return a matrix that rotates between a coordinate system
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// defined with the given forward and up vectors, and the standard coordinate
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// system with y-forward and z-up. They differ only in their behavior when
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// the supplied forward and up vectors are not perpendicular; in this case,
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// look_at will match the forward vector precisely, while heads_up will match
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// the up vector precisely.
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// Since these functions only return a rotation matrix, the translation
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// component is always zero. There are flavors of these functions that simply
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// return the upper 3x3 part of the matrix, and flavors that return the whole
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// 4x4 matrix with a zero bottom row.
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BEGIN_PUBLISH
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EXPCL_PANDA_MATHUTIL void
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heads_up(FLOATNAME(LMatrix3) &mat, const FLOATNAME(LVector3) &fwd,
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const FLOATNAME(LVector3) &up = FLOATNAME(LVector3)::up(),
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CoordinateSystem cs = CS_default);
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EXPCL_PANDA_MATHUTIL void
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look_at(FLOATNAME(LMatrix3) &mat, const FLOATNAME(LVector3) &fwd,
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const FLOATNAME(LVector3) &up = FLOATNAME(LVector3)::up(),
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CoordinateSystem cs = CS_default);
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INLINE_MATHUTIL void
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heads_up(FLOATNAME(LMatrix3) &mat, const FLOATNAME(LVector3) &fwd,
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CoordinateSystem cs);
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INLINE_MATHUTIL void
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look_at(FLOATNAME(LMatrix3) &mat, const FLOATNAME(LVector3) &fwd,
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CoordinateSystem cs);
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INLINE_MATHUTIL void
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heads_up(FLOATNAME(LMatrix4) &mat, const FLOATNAME(LVector3) &fwd,
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const FLOATNAME(LVector3) &up = FLOATNAME(LVector3)::up(),
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CoordinateSystem cs = CS_default);
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INLINE_MATHUTIL void
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look_at(FLOATNAME(LMatrix4) &mat, const FLOATNAME(LVector3) &fwd,
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const FLOATNAME(LVector3) &up = FLOATNAME(LVector3)::up(),
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CoordinateSystem cs = CS_default);
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INLINE_MATHUTIL void
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heads_up(FLOATNAME(LMatrix4) &mat, const FLOATNAME(LVector3) &fwd,
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CoordinateSystem cs);
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INLINE_MATHUTIL void
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look_at(FLOATNAME(LMatrix4) &mat, const FLOATNAME(LVector3) &fwd,
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CoordinateSystem cs);
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INLINE_MATHUTIL void
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heads_up(FLOATNAME(LQuaternion) &quat, const FLOATNAME(LVector3) &fwd,
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const FLOATNAME(LVector3) &up = FLOATNAME(LVector3)::up(),
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CoordinateSystem cs = CS_default);
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INLINE_MATHUTIL void
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look_at(FLOATNAME(LQuaternion) &quat, const FLOATNAME(LVector3) &fwd,
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const FLOATNAME(LVector3) &up = FLOATNAME(LVector3)::up(),
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CoordinateSystem cs = CS_default);
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INLINE_MATHUTIL void
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heads_up(FLOATNAME(LQuaternion) &quat, const FLOATNAME(LVector3) &fwd,
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CoordinateSystem cs);
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INLINE_MATHUTIL void
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look_at(FLOATNAME(LQuaternion) &quat, const FLOATNAME(LVector3) &fwd,
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CoordinateSystem cs);
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END_PUBLISH
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#include "look_at_src.I"
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