68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
#ifndef _frustrum_h_ /* Is this your first time? */
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#define _frustrum_h_ 1
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#include "kshape.h"
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/*
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* KJL 15:13:43 7/17/97 - frustrum.h
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*
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* function prototypes & pointers for things connected
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* to the view frustrum and clipping
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*
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*/
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enum FrustrumType
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{
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FRUSTRUM_TYPE_NORMAL,
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FRUSTRUM_TYPE_WIDE
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};
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extern void SetFrustrumType(enum FrustrumType frustrumType);
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/* GOURAUD POLYGON CLIPPING */
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extern void GouraudPolygon_ClipWithZ(void);
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extern void (*GouraudPolygon_ClipWithNegativeX)(void);
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extern void (*GouraudPolygon_ClipWithPositiveY)(void);
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extern void (*GouraudPolygon_ClipWithNegativeY)(void);
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extern void (*GouraudPolygon_ClipWithPositiveX)(void);
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/* TEXTURED POLYGON CLIPPING */
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extern void TexturedPolygon_ClipWithZ(void);
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extern void (*TexturedPolygon_ClipWithNegativeX)(void);
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extern void (*TexturedPolygon_ClipWithPositiveY)(void);
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extern void (*TexturedPolygon_ClipWithNegativeY)(void);
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extern void (*TexturedPolygon_ClipWithPositiveX)(void);
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/* GOURAUD TEXTURED POLYGON CLIPPING */
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extern void GouraudTexturedPolygon_ClipWithZ(void);
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extern void (*GouraudTexturedPolygon_ClipWithNegativeX)(void);
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extern void (*GouraudTexturedPolygon_ClipWithPositiveY)(void);
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extern void (*GouraudTexturedPolygon_ClipWithNegativeY)(void);
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extern void (*GouraudTexturedPolygon_ClipWithPositiveX)(void);
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/* FRUSTRUM TESTS */
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extern int PolygonWithinFrustrum(POLYHEADER *polyPtr);
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extern int PolygonShouldBeDrawn(POLYHEADER *polyPtr);
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extern int (*ObjectWithinFrustrum)(DISPLAYBLOCK *dbPtr);
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extern int (*ObjectCompletelyWithinFrustrum)(DISPLAYBLOCK *dbPtr);
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extern int (*VertexWithinFrustrum)(RENDERVERTEX *vertexPtr);
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extern void (*TestVerticesWithFrustrum)(void);
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extern int DecalWithinFrustrum(DECAL *decalPtr);
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extern int QuadWithinFrustrum(void);
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extern int TriangleWithinFrustrum(void);
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/* pass a pointer to a vertex to be tested; results are returned in an int,
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using the following defines */
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#define INSIDE_FRUSTRUM_Z_PLANE 1
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#define INSIDE_FRUSTRUM_PX_PLANE 2
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#define INSIDE_FRUSTRUM_NX_PLANE 4
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#define INSIDE_FRUSTRUM_PY_PLANE 8
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#define INSIDE_FRUSTRUM_NY_PLANE 16
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#define INSIDE_FRUSTRUM 31
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extern char FrustrumFlagForVertex[maxrotpts];
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#define USE_FOV_53 0
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#endif
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