IceRay.h File Reference

Go to the source code of this file.

Classes
class	Ray

Macros
#define	__ICERAY_H__

Functions
inline_ void	ComputeReflexionVector (Point &reflected, const Point &incoming_dir, const Point &outward_normal)
inline_ void	ComputeReflexionVector (Point &reflected, const Point &source, const Point &impact, const Point &normal)
inline_ void	DecomposeVector (Point &normal_compo, Point &tangent_compo, const Point &outward_dir, const Point &outward_normal)
inline_ void	ComputeLocalDirection (Point &local_dir, const Point &world_dir, const Matrix4x4 &world)
inline_ void	ComputeLocalPoint (Point &local_pt, const Point &world_pt, const Matrix4x4 &world)
inline_ void	ComputeLocalRay (Ray &local_ray, const Ray &world_ray, const Matrix4x4 &world)

Detailed Description

Contains code for rays.

Author

Pierre Terdiman

Date

April, 4, 2000

Definition in file IceRay.h.

Macro Definition Documentation

#define __ICERAY_H__

Definition at line 14 of file Opcode.h.

Function Documentation

inline_ void ComputeLocalDirection	(	Point &	local_dir,
		const Point &	world_dir,
		const Matrix4x4 &	world
	)

Transforms a direction vector from world space to local space

Parameters

local_dir	[out] direction vector in local space
world_dir	[in] direction vector in world space
world	[in] world transform

Definition at line 59 of file IceRay.h.

    {
        // Get world direction back in local space
//      Matrix3x3 InvWorld = world;
//      local_dir = InvWorld * world_dir;
        local_dir = Matrix3x3(world) * world_dir;
    }

inline_ void ComputeLocalPoint	(	Point &	local_pt,
		const Point &	world_pt,
		const Matrix4x4 &	world
	)

Transforms a position vector from world space to local space

Parameters

local_pt	[out] position vector in local space
world_pt	[in] position vector in world space
world	[in] world transform

Definition at line 75 of file IceRay.h.

    {
        // Get world vertex back in local space
        Matrix4x4 InvWorld = world;
        InvWorld.Invert();
        local_pt = world_pt * InvWorld;
    }

inline_ void ComputeLocalRay	(	Ray &	local_ray,
		const Ray &	world_ray,
		const Matrix4x4 &	world
	)

Transforms a ray from world space to local space

Parameters

local_ray	[out] ray in local space
world_ray	[in] ray in world space
world	[in] world transform

Definition at line 91 of file IceRay.h.

    {
        // Get world ray back in local space
        ComputeLocalDirection(local_ray.mDir, world_ray.mDir, world);
        ComputeLocalPoint(local_ray.mOrig, world_ray.mOrig, world);
    }

inline_ void ComputeReflexionVector	(	Point &	reflected,
		const Point &	incoming_dir,
		const Point &	outward_normal
	)

Definition at line 34 of file IceRay.h.

    {
        reflected = incoming_dir - outward_normal * 2.0f * (incoming_dir|outward_normal);
    }

inline_ void ComputeReflexionVector	(	Point &	reflected,
		const Point &	source,
		const Point &	impact,
		const Point &	normal
	)

Definition at line 39 of file IceRay.h.

References V.

    {
        Point V = impact - source;
        reflected = V - normal * 2.0f * (V|normal);
    }

inline_ void DecomposeVector	(	Point &	normal_compo,
		Point &	tangent_compo,
		const Point &	outward_dir,
		const Point &	outward_normal
	)

Definition at line 45 of file IceRay.h.

    {
        normal_compo = outward_normal * (outward_dir|outward_normal);
        tangent_compo = outward_dir - normal_compo;
    }