ReactOS  0.4.15-dev-3324-gda4e15f
geom.h
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1 /*
2  * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3  * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
4  *
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9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice including the dates of first publication and
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14  * http://oss.sgi.com/projects/FreeB/
15  * shall be included in all copies or substantial portions of the Software.
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17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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29  */
30 /*
31 ** Author: Eric Veach, July 1994.
32 **
33 */
34 
35 #ifndef __geom_h_
36 #define __geom_h_
37 
38 #include "mesh.h"
39 
40 #ifdef NO_BRANCH_CONDITIONS
41 /* MIPS architecture has special instructions to evaluate boolean
42  * conditions -- more efficient than branching, IF you can get the
43  * compiler to generate the right instructions (SGI compiler doesn't)
44  */
45 #define VertEq(u,v) (((u)->s == (v)->s) & ((u)->t == (v)->t))
46 #define VertLeq(u,v) (((u)->s < (v)->s) | \
47  ((u)->s == (v)->s & (u)->t <= (v)->t))
48 #else
49 #define VertEq(u,v) ((u)->s == (v)->s && (u)->t == (v)->t)
50 #define VertLeq(u,v) (((u)->s < (v)->s) || \
51  ((u)->s == (v)->s && (u)->t <= (v)->t))
52 #endif
53 
54 #define EdgeEval(u,v,w) __gl_edgeEval(u,v,w)
55 #define EdgeSign(u,v,w) __gl_edgeSign(u,v,w)
56 
57 /* Versions of VertLeq, EdgeSign, EdgeEval with s and t transposed. */
58 
59 #define TransLeq(u,v) (((u)->t < (v)->t) || \
60  ((u)->t == (v)->t && (u)->s <= (v)->s))
61 #define TransEval(u,v,w) __gl_transEval(u,v,w)
62 #define TransSign(u,v,w) __gl_transSign(u,v,w)
63 
64 
65 #define EdgeGoesLeft(e) VertLeq( (e)->Dst, (e)->Org )
66 #define EdgeGoesRight(e) VertLeq( (e)->Org, (e)->Dst )
67 
68 #undef ABS
69 #define ABS(x) ((x) < 0 ? -(x) : (x))
70 #define VertL1dist(u,v) (ABS(u->s - v->s) + ABS(u->t - v->t))
71 
72 #define VertCCW(u,v,w) __gl_vertCCW(u,v,w)
73 
81  GLUvertex *o2, GLUvertex *d2,
82  GLUvertex *v );
83 
84 #endif
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble * u
Definition: glfuncs.h:240
double GLdouble
Definition: gl.h:163
GLubyte GLubyte GLubyte GLubyte w
Definition: glext.h:6102
GLdouble __gl_transSign(GLUvertex *u, GLUvertex *v, GLUvertex *w)
Definition: geom.c:132
GLdouble __gl_transEval(GLUvertex *u, GLUvertex *v, GLUvertex *w)
Definition: geom.c:102
GLdouble __gl_edgeEval(GLUvertex *u, GLUvertex *v, GLUvertex *w)
Definition: geom.c:47
int __gl_vertCCW(GLUvertex *u, GLUvertex *v, GLUvertex *w)
Definition: geom.c:153
void __gl_edgeIntersect(GLUvertex *o1, GLUvertex *d1, GLUvertex *o2, GLUvertex *d2, GLUvertex *v)
Definition: geom.c:203
GLdouble __gl_edgeSign(GLUvertex *u, GLUvertex *v, GLUvertex *w)
Definition: geom.c:77
const GLdouble * v
Definition: gl.h:2040
int __gl_vertLeq(GLUvertex *u, GLUvertex *v)
Definition: geom.c:40