t_rasterpos.c File Reference

#include "main/glheader.h"
#include "main/colormac.h"
#include "main/context.h"
#include "main/feedback.h"
#include "main/light.h"
#include "main/macros.h"
#include "main/rastpos.h"
#include "main/simple_list.h"
#include "main/mtypes.h"
#include "math/m_matrix.h"
#include "tnl/tnl.h"

Functions
static GLuint	viewclip_point_xy (const GLfloat v[])
	Clip a point against the view volume.
static GLuint	viewclip_point_z (const GLfloat v[])
	Clip a point against the far/near Z clipping planes.
static GLuint	userclip_point (GLcontext *ctx, const GLfloat v[])
	Clip a point against the user clipping planes.
static void	shade_rastpos (GLcontext *ctx, const GLfloat vertex[4], const GLfloat normal[3], GLfloat Rcolor[4], GLfloat Rspec[4], GLfloat *Rindex)
	Compute lighting for the raster position.
static void	compute_texgen (GLcontext *ctx, const GLfloat vObj[4], const GLfloat vEye[4], const GLfloat normal[3], GLuint unit, GLfloat texcoord[4])
	Do texgen needed for glRasterPos.
void	_tnl_RasterPos (GLcontext *ctx, const GLfloat vObj[4])
	glRasterPos transformation.

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Function Documentation

void _tnl_RasterPos	(	GLcontext *	ctx,
		const GLfloat	vObj[4]
	)

glRasterPos transformation.

Typically called via ctx->Driver.RasterPos(). XXX some of this code (such as viewport xform, clip testing and setting of ctx->Current.Raster* fields) could get lifted up into the main/rasterpos.c code.

Parameters:

vObj

vertex position in object space

static void compute_texgen	(	GLcontext *	ctx,
		const GLfloat	vObj[4],
		const GLfloat	vEye[4],
		const GLfloat	normal[3],
		GLuint	unit,
		GLfloat	texcoord[4]
	)			[static]

Do texgen needed for glRasterPos.

Parameters:

	ctx	rendering context
	vObj	object-space vertex coordinate
	vEye	eye-space vertex coordinate
	normal	vertex normal
	unit	texture unit number
	texcoord	incoming texcoord and resulting texcoord

static void shade_rastpos	(	GLcontext *	ctx,
		const GLfloat	vertex[4],
		const GLfloat	normal[3],
		GLfloat	Rcolor[4],
		GLfloat	Rspec[4],
		GLfloat *	Rindex
	)			[static]

Compute lighting for the raster position.

Both RGB and CI modes computed.

Parameters:

	ctx	the context
	vertex	vertex location
	normal	normal vector
	Rcolor	returned color
	Rspec	returned specular color (if separate specular enabled)
	Rindex	returned color index

static GLuint userclip_point	(	GLcontext *	ctx,
		const GLfloat	v[]
	)			[static]

Clip a point against the user clipping planes.

Parameters:

	ctx	GL context.
	v	vertex vector describing the point to clip.

Returns:

zero if the point was clipped, or one otherwise.

static GLuint viewclip_point_xy

(

const GLfloat

v[]

)

[static]

Clip a point against the view volume.

Parameters:

v

vertex vector describing the point to clip.

Returns:

zero if outside view volume, or one if inside.

static GLuint viewclip_point_z

(

const GLfloat

v[]

)

[static]

Clip a point against the far/near Z clipping planes.

Parameters:

v

vertex vector describing the point to clip.

Returns:

zero if outside view volume, or one if inside.

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