#include <VertexContext.h>

Public Types
typedef void(*	TextureSampler) (Iop material, const Vector2 &center, const Vector2 &dU, const Vector2 &dV, TextureFilter f, Pixel &out, void *context)

Public Member Functions
	VertexContext (const VertexContext &vtx)

Scene *	scene () const

void	set_scene (Scene *s)

const GeoInfo *	geoinfo () const

void	set_geoinfo (const GeoInfo *g)

const Primitive *	primitive () const

void	set_primitive (const Primitive *p)

const GeoInfoRenderState *	get_renderstate () const

void	set_renderstate (const GeoInfoRenderState *r)

rPrimitive *	rprimitive () const

void	set_rprimitive (rPrimitive *rp)

Iop *	rmaterial () const

void	set_rmaterial (Iop *m)

Box3 &	face_uv_bbox ()

unsigned &	face_clipmask ()

void	set_transforms (MatrixArray *m)

MatrixArray *	transforms () const

const Matrix4 &	matrix (int n) const

const Matrix4 &	inverse_matrix (int n) const

PrimitiveTestCache *	ray_test_cache () const

void	set_ray_test_cache (PrimitiveTestCache *r)

TextureSampler	texture_sampler () const

void	set_texture_sampler (TextureSampler t)

Vector4 &	P () const

Vector4 &	dPdu () const

Vector4 &	dPdv () const

float	x () const

float	y () const

float	z () const

float	w () const

Vector3 &	PL () const

Vector3 &	dPLdu () const

Vector3 &	dPLdv () const

Vector3 &	PW () const

Vector3 &	dPWdu () const

Vector3 &	dPWdv () const

Vector3 &	MB () const

Vector3 &	dMBdu () const

Vector3 &	dMBdv () const

Vector4 &	UV () const

Vector4 &	dUVdu () const

Vector4 &	dUVdv () const

Vector3 &	N () const

Vector3 &	dNdu () const

Vector3 &	dNdv () const

Vector4 &	Cf () const

Vector4 &	dCfdu () const

Vector4 &	dCfdv () const

float	r () const

float	g () const

float	b () const

float	a () const

Vector3 &	VEL () const

Vector3 &	dVELdu () const

Vector3 &	dVELdv () const

void	sample (Iop *material, Pixel &out) const

Public Attributes
VArray	vP
	Current values for fragment_shader.

VArray	vdX
	Change if X of render pixel is increased by 1.

VArray	vdY
	Change if Y of render pixel is increased by 1.

Vector3	ambient
	Global ambient setting.

Iop *	blending_shader

bool	texture_sampling

void *	render_context

Detailed Description

This class is intended to be passed up a vertex shader tree. It's initialized with basic vertex info like the point location, a UV coordinate and a normal. A shader can then modify the parameters producing effects like point displacement, UV projection, and normal remapping.

Member Typedef Documentation

◆ TextureSampler

typedef void(* DD::Image::VertexContext::TextureSampler) (Iop *material, const Vector2 &center, const Vector2 &dU, const Vector2 &dV, TextureFilter *f, Pixel &out, void *context)

Callback to redefine the texture sampler

Member Function Documentation

◆ sample()

void VertexContext::sample	(	Iop *	material,
		Pixel &	out
	)		const

Use the UV and the derivatives of UV to sample the incoming image. UV of 0,0 is mapped to the lower-left corner of the image's format, and 1,1 is mapped to the upper-right corner.

References DD::Image::IopInfoOwner::channels(), DD::Image::ChannelSet::contains(), DD::Image::IopInfoOwner::format(), DD::Image::Box::h(), DD::Image::Iop::sample(), DD::Image::Box::w(), DD::Image::Box::x(), and DD::Image::Box::y().

Referenced by DD::Image::Render::draw_primitives(), and DD::Image::Iop::fragment_shader().