clip.c File Reference

#include "zgl.h"

Go to the source code of this file.

Macros
#define	CLIP_XMIN   (1<<0)
#define	CLIP_XMAX   (1<<1)
#define	CLIP_YMIN   (1<<2)
#define	CLIP_YMAX   (1<<3)
#define	CLIP_ZMIN   (1<<4)
#define	CLIP_ZMAX   (1<<5)
#define	clip_func(name, sign, dir, dir1, dir2)

Functions
void	gl_transform_to_viewport (GLContext *c, GLVertex *v)
void	gl_draw_point (GLContext *c, GLVertex *p0)
void	gl_draw_line (GLContext *c, GLVertex *p1, GLVertex *p2)
	clip_func (clip_xmin, clip_func(-, clip_func(X, clip_func(Y, clip_func(Z)
void	gl_draw_triangle (GLContext *c, GLVertex *p0, GLVertex *p1, GLVertex *p2)
void	gl_draw_triangle_select (GLContext *c, GLVertex *p0, GLVertex *p1, GLVertex *p2)
void	gl_draw_triangle_fill (GLContext *c, GLVertex *p0, GLVertex *p1, GLVertex *p2)
void	gl_draw_triangle_line (GLContext *c, GLVertex *p0, GLVertex *p1, GLVertex *p2)
void	gl_draw_triangle_point (GLContext *c, GLVertex *p0, GLVertex *p1, GLVertex *p2)

Macro Definition Documentation

clip_func

#define clip_func	(		name,
			sign,
			dir,
			dir1,
			dir2
	)

Value:

static float name(V4 *c,V4 *a,V4 *b) \
{\
  float t,dX,dY,dZ,dW,den;\
  dX = (b->X - a->X);\
  dY = (b->Y - a->Y);\
  dZ = (b->Z - a->Z);\
  dW = (b->W - a->W);\
  den = -(sign d ## dir) + dW;\
  if (den == 0) t=0;\
  else t = ( sign a->dir - a->W) / den;\
  c->dir1 = a->dir1 + t * d ## dir1;\
  c->dir2 = a->dir2 + t * d ## dir2;\
  c->W = a->W + t * dW;\
  c->dir = sign c->W;\
  return t;\
}

Definition at line 177 of file clip.c.

CLIP_XMAX

#define CLIP_XMAX   (1<<1)

Definition at line 7 of file clip.c.

CLIP_XMIN

#define CLIP_XMIN   (1<<0)

Definition at line 6 of file clip.c.

CLIP_YMAX

#define CLIP_YMAX   (1<<3)

Definition at line 9 of file clip.c.

CLIP_YMIN

#define CLIP_YMIN   (1<<2)

Definition at line 8 of file clip.c.

CLIP_ZMAX

#define CLIP_ZMAX   (1<<5)

Definition at line 11 of file clip.c.

CLIP_ZMIN

#define CLIP_ZMIN   (1<<4)

Definition at line 10 of file clip.c.

Function Documentation

clip_func()

clip_func	(	clip_xmin	,
		clip_func(	-,
		clip_func(	X,
		clip_func(	Y,
		clip_func(	Z
	)

Definition at line 196 of file clip.c.

gl_draw_line()

void gl_draw_line	(	GLContext *	c,
		GLVertex *	p1,
		GLVertex *	p2
	)

Definition at line 112 of file clip.c.

gl_draw_point()

void gl_draw_point	(	GLContext *	c,
		GLVertex *	p0
	)

Definition at line 65 of file clip.c.

gl_draw_triangle()

void gl_draw_triangle	(	GLContext *	c,
		GLVertex *	p0,
		GLVertex *	p1,
		GLVertex *	p2
	)

Definition at line 241 of file clip.c.

gl_draw_triangle_fill()

void gl_draw_triangle_fill	(	GLContext *	c,
		GLVertex *	p0,
		GLVertex *	p1,
		GLVertex *	p2
	)

Definition at line 383 of file clip.c.

gl_draw_triangle_line()

void gl_draw_triangle_line	(	GLContext *	c,
		GLVertex *	p0,
		GLVertex *	p1,
		GLVertex *	p2
	)

Definition at line 418 of file clip.c.

gl_draw_triangle_point()

void gl_draw_triangle_point	(	GLContext *	c,
		GLVertex *	p0,
		GLVertex *	p1,
		GLVertex *	p2
	)

Definition at line 435 of file clip.c.

gl_draw_triangle_select()

void gl_draw_triangle_select	(	GLContext *	c,
		GLVertex *	p0,
		GLVertex *	p1,
		GLVertex *	p2
	)

Definition at line 373 of file clip.c.

gl_transform_to_viewport()

void gl_transform_to_viewport	(	GLContext *	c,
		GLVertex *	v
	)

Definition at line 13 of file clip.c.