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Gold Medal Software 1
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Gold Medal Software Volume 1 (Gold Medal) (1994).iso
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povsrc20.arj
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SOURCE
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CAMERA.C
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1993-07-28
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/****************************************************************************
* camera.c
*
* This module implements methods for managing the viewpoint.
*
* from Persistence of Vision Raytracer
* Copyright 1993 Persistence of Vision Team
*---------------------------------------------------------------------------
* NOTICE: This source code file is provided so that users may experiment
* with enhancements to POV-Ray and to port the software to platforms other
* than those supported by the POV-Ray Team. There are strict rules under
* which you are permitted to use this file. The rules are in the file
* named POVLEGAL.DOC which should be distributed with this file. If
* POVLEGAL.DOC is not available or for more info please contact the POV-Ray
* Team Coordinator by leaving a message in CompuServe's Graphics Developer's
* Forum. The latest version of POV-Ray may be found there as well.
*
* This program is based on the popular DKB raytracer version 2.12.
* DKBTrace was originally written by David K. Buck.
* DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
*
*****************************************************************************/
#include "frame.h"
#include "vector.h"
#include "povproto.h"
void Translate_Camera (Camera, Vector)
CAMERA *Camera;
VECTOR *Vector;
{
VAdd (((CAMERA *) Camera) -> Location,
((CAMERA *) Camera) -> Location,
*Vector);
}
void Rotate_Camera (Camera, Vector)
CAMERA *Camera;
VECTOR *Vector;
{
TRANSFORM Trans;
Compute_Rotation_Transform(&Trans, Vector);
Transform_Camera (Camera, &Trans);
}
void Scale_Camera (Camera, Vector)
CAMERA *Camera;
VECTOR *Vector;
{
TRANSFORM Trans;
Compute_Scaling_Transform(&Trans, Vector);
Transform_Camera (Camera, &Trans);
}
void Transform_Camera (Camera, Trans)
CAMERA *Camera;
TRANSFORM *Trans;
{
MTransPoint (&(Camera -> Location), &(Camera -> Location), Trans);
MTransPoint (&(Camera -> Direction), &(Camera -> Direction), Trans);
MTransPoint (&(Camera -> Up), &(Camera -> Up), Trans);
MTransPoint (&(Camera -> Right), &(Camera -> Right), Trans);
}
CAMERA *Copy_Camera (Old)
CAMERA *Old;
{
CAMERA *New;
if (Old != NULL)
{
New = Create_Camera ();
*New = *Old;
}
else
New = NULL;
return (New);
}
CAMERA *Create_Camera ()
{
CAMERA *New;
if ((New = (CAMERA *) malloc (sizeof (CAMERA))) == NULL)
MAError ("camera");
Make_Vector (&(New->Location), 0.0, 0.0, 0.0);
Make_Vector (&(New->Direction), 0.0, 0.0, 1.0);
Make_Vector (&(New->Up), 0.0, 1.0, 0.0);
Make_Vector (&(New->Right), 1.33, 0.0, 0.0);
Make_Vector (&(New->Sky), 0.0, 1.0, 0.0);
return (New);
}