Transformable Class Reference

#include <Transformable.h>

Inheritance diagram for Transformable:

List of all members.

Public Member Functions
void	reset ()
void	translate (f32 x, f32 y, f32 z)
void	translate (vec3f v)
void	scale (f32 x, f32 y, f32 z)
void	scale (vec3f v)
void	scale (f32 uniform)
void	rotate (f32 angle, f32 x, f32 y, f32 z)
void	rotate (f32 angle, vec3f v)
void	rotateX (f32 angle)
void	rotateY (f32 angle)
void	rotateZ (f32 angle)
void	setTranslate (f32 x, f32 y, f32 z)
void	setTranslate (vec3f v)
void	setScale (f32 x, f32 y, f32 z)
void	setScale (vec3f v)
void	setScale (f32 uniform)
void	setRotate (f32 angle, f32 x, f32 y, f32 z)
void	setRotate (f32 angle, vec3f v)
void	setRotateX (f32 angle)
void	setRotateY (f32 angle)
void	setRotateZ (f32 angle)
mat3f	getRotation ()
vec3f	getTranslation ()
vec3f	getScale ()
mat4f	getTranslationMatrix ()
mat4f	getRotationMatrix ()
mat4f	getScaleMatrix ()
mat4f	getTranslationMatrixInverse ()
mat4f	getRotationMatrixInverse ()
mat4f	getScaleMatrixInverse ()
mat4f	getTranslationRotationMatrix ()
mat4f	getLocalMatrix ()
mat4f	getLocalMatrixInverse ()
mat4f	getWorldMatrix ()
mat4f	getWorldMatrixInverse ()
mat3f	getWorldNormalMatrix ()
vec3f	getLocalFront ()
vec3f	getLocalUp ()
vec3f	getLocalRight ()
vec3f	getWorldFront ()
vec3f	getWorldUp ()
vec3f	getWorldRight ()
void	lookAt (vec3f front_vec, vec3f up_vec)
void	lookAt (vec3f front_vec)
vec3f	getWorldPosition (vec3f pos)
vec3f	getWorldPosition ()
bool	isTransformable ()
void	setFreeze (bool do_freeze)
Static Public Member Functions
static void	registerCommands ()
Public Attributes
Group *	axis
Protected Member Functions
	Transformable (const char *nname, NodeType_t ntype)
void	detached ()
void	logTransformableInfo ()
Protected Attributes
mat3f	R
vec3f	T
vec3f	S
mat4f	worldMatrix
mat4f	worldMatrixInverse
i32	transformTime
i32	parentWorldTime
i32	worldTime
i32	worldInvTime
i32	parentWorldInvTime
bool	frozen
Friends
class	SceneGraph
class	World
class	Camera
class	Geometry

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Detailed Description

Defines a Transformable node. Inherits from Node.

A transformation M is composed of rotation, translation and scale. We define M as:

M = T * R * S

Transformations are hierachical. This means that every transformable child node will inherit the transformations of its parent. Let's say for instance, that there are two nodes A and B. A is the parent of B and both are transformable. The local transformation of A is denoted Ma and for B its Ma. The matrix that brings nodes A and B to world space is denoted Wa and Wa. The resulting transformations for the nodes will then be:

Ma = Ta * Ra * Sa Mb = Tb * Rb * Sb

Wa = Ma = Ta * Ra * Sa Wb = Ma * Mb = (Ta * Ra * Sa) * (Ta * Rb * Sb)

The MB matrix will then, in turn, be recursively be applied to any children of node B to construct new model->world matrices, in the same manner as in the example above.

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Member Function Documentation

vec3f Transformable::getWorldPosition

(

vec3f

pos )

Transform point from model space to world space. It's faster to fetch the world-transform and perform the mult on the host side if multiple points should be transformed.

vec3f Transformable::getWorldPosition

(

)

Get the world position of point (0, 0, 0) in model space transformed in to world space

void Transformable::lookAt	(	vec3f	front_vec,
		vec3f	up_vec
	)

LookAt

Note 1: Function will exit if front_vec is (close to) parallel to the Y-axis; supply your own up_vec if this is the case. Note 2: Not fully bug-tested, use at own risk...

Example: Make camera look at 'my_node'. Note that world space positions are used. camera->lookAt( my_node->getWorldPosition() - camera->getWorldPosition() );

LookAt

Note 1: Function will exit if front_vec is (close to) parallel to the Y-axis; supply your own up_vec if this is the case. Note 2: Not fully tested, use at own risk...

Example: Make camera look at 'my_node'. Note that world space positions are used. camera->lookAt( my_node->getWorldPosition() - camera->getWorldPosition() );

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The documentation for this class was generated from the following files:

• C:/Users/Malacka/Desktop/Magnus/RenderChimp/src/Transformable.h
• C:/Users/Malacka/Desktop/Magnus/RenderChimp/src/Transformable.cpp