nlua_transform.c File Reference

Handles transforms. More...

#include "nlua_transform.h"
#include "nluadef.h"

Include dependency graph for nlua_transform.c:

Go to the source code of this file.

Functions
static int	transformL_tostring (lua_State *L)
	Gets a string representing the transform.
static int	transformL_eq (lua_State *L)
	Compares two transforms to see if they are the same.
static int	transformL_new (lua_State *L)
	Creates a new identity transform.Gets a transform.
static int	transformL_mul (lua_State *L)
	Multiplies two transforms (A*B).
static int	transformL_get (lua_State *L)
	Gets all the values of the transform.
static int	transformL_set (lua_State *L)
	Sets an element of a transform.
static int	transformL_scale (lua_State *L)
	Applies scaling to a transform.
static int	transformL_translate (lua_State *L)
	Applies translation to a transform.
static int	transformL_rotate2d (lua_State *L)
	Applies a 2D rotation (along Z-axis) to a transform.
static int	transformL_ortho (lua_State *L)
	Creates an orthogonal matrix.
static int	transformL_applyPoint (lua_State *L)
	Applies a transformation to a point.
static int	transformL_applyDim (lua_State *L)
	Applies a transformation to a dimension.
int	nlua_loadTransform (nlua_env env)
	Loads the transform library.
mat4 *	lua_totransform (lua_State *L, int ind)
	Lua bindings to interact with transforms.
mat4 *	luaL_checktransform (lua_State *L, int ind)
	Gets transform at index or raises error if there is no transform at index.
mat4 *	lua_pushtransform (lua_State *L, mat4 transform)
	Pushes a transform on the stack.
int	lua_istransform (lua_State *L, int ind)
	Checks to see if ind is a transform.

Variables
static const luaL_Reg	transformL_methods []

Detailed Description

Handles transforms.

Definition in file nlua_transform.c.

Function Documentation

lua_istransform()

int lua_istransform	(	lua_State *	L,
		int	ind )

Checks to see if ind is a transform.

Parameters

L	Lua state to check.
ind	Index position to check.

Returns

1 if ind is a transform.

Definition at line 113 of file nlua_transform.c.

lua_pushtransform()

mat4 * lua_pushtransform	(	lua_State *	L,
		mat4	transform )

Pushes a transform on the stack.

Parameters

L	Lua state to push transform into.
transform	Transform to push.

Returns

Newly pushed transform.

Definition at line 98 of file nlua_transform.c.

lua_totransform()

mat4 * lua_totransform	(	lua_State *	L,
		int	ind )

Lua bindings to interact with transforms.

Lua module: transform

Gets transform at index.

Parameters

L	Lua state to get transform from.
ind	Index position to find the transform.

Returns

Transform found at the index in the state.

Definition at line 72 of file nlua_transform.c.

luaL_checktransform()

mat4 * luaL_checktransform	(	lua_State *	L,
		int	ind )

Gets transform at index or raises error if there is no transform at index.

Parameters

L	Lua state to get transform from.
ind	Index position to find transform.

Returns

Transform found at the index in the state.

Definition at line 84 of file nlua_transform.c.

nlua_loadTransform()

int nlua_loadTransform

(

nlua_env

env

)

Loads the transform library.

Parameters

env	Environment to load transform library into.

Returns

0 on success.

Definition at line 54 of file nlua_transform.c.

transformL_applyDim()

int transformL_applyDim ( lua_State * L )

static

Applies a transformation to a dimension.

Note

This is similar to Transform.applyPoint, except the translation is not applied.

Lua function parameter: Transform T Transform to apply. Lua function parameter: number x Dimension X-coordinate. Lua function parameter: number y Dimension Y-coordinate. Lua function parameter: number z Dimension Z-coordinate. Lua return parameter: number New X coordinate. Lua return parameter: number New Y coordinate. Lua return parameter: number New Z coordinate.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: applyDim

Definition at line 379 of file nlua_transform.c.

transformL_applyPoint()

int transformL_applyPoint ( lua_State * L )

static

Applies a transformation to a point.

Lua function parameter: Transform T Transform to apply. Lua function parameter: number x Point X-coordinate. Lua function parameter: number y Point Y-coordinate. Lua function parameter: number z Point Z-coordinate. Lua return parameter: number New X coordinate. Lua return parameter: number New Y coordinate. Lua return parameter: number New Z coordinate.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: applyPoint

Definition at line 346 of file nlua_transform.c.

transformL_eq()

int transformL_eq ( lua_State * L )

static

Compares two transforms to see if they are the same.

Lua function parameter: Transform t1 Transform 1 to compare. Lua function parameter: Transform t2 Transform 2 to compare. Lua return parameter: boolean true if both transforms are the same.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: __eq

Definition at line 153 of file nlua_transform.c.

transformL_get()

int transformL_get ( lua_State * L )

static

Gets all the values of the transform.

Note, this returns in column-major.

Lua function parameter: Transform T Transform te get parameters of. Lua return parameter: table 2D table containing all the values of the transform.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: get

Definition at line 204 of file nlua_transform.c.

transformL_mul()

int transformL_mul ( lua_State * L )

static

Multiplies two transforms (A*B).

Lua function parameter: Transform A First element to multiply. Lua function parameter: Transform B Second element to multiply. Lua return parameter: Transform Result of multiplication.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: __mul

Definition at line 185 of file nlua_transform.c.

transformL_new()

int transformL_new ( lua_State * L )

static

Creates a new identity transform.Gets a transform.

Lua return parameter: Transform A new transform corresponding to an identity matrix.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: new

Definition at line 167 of file nlua_transform.c.

transformL_ortho()

int transformL_ortho ( lua_State * L )

static

Creates an orthogonal matrix.

Lua function parameter: number left Left value. Lua function parameter: number right Right value. Lua function parameter: number bottom Bottom value. Lua function parameter: number top Top value. Lua function parameter: number nearVal value. Lua function parameter: number farVal value. Lua return parameter: Transform A new transformation.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: translate

Definition at line 321 of file nlua_transform.c.

transformL_rotate2d()

int transformL_rotate2d ( lua_State * L )

static

Applies a 2D rotation (along Z-axis) to a transform.

Lua function parameter: Transform T Transform to apply rotation to. Lua function parameter: number angle Angle to rotate (radians).

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: rotate2d

Definition at line 299 of file nlua_transform.c.

transformL_scale()

int transformL_scale ( lua_State * L )

static

Applies scaling to a transform.

Lua function parameter: Transform T Transform to apply scaling to. Lua function parameter: number x X-axis scaling. Lua function parameter: number y Y-axis scaling. Lua function parameter: number z Z-axis scaling. Lua return parameter: Transform A new transformation.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: scale

Definition at line 258 of file nlua_transform.c.

transformL_set()

int transformL_set ( lua_State * L )

static

Sets an element of a transform.

Lua function parameter: Transform T Transform to set element of. Lua function parameter: number i Column to set. Lua function parameter: number j Row to set. Lua function parameter: number v Value to set to.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: set

Definition at line 228 of file nlua_transform.c.

transformL_tostring()

int transformL_tostring ( lua_State * L )

static

Gets a string representing the transform.

Lua function parameter: Transform t Transform to get string of. Lua return parameter: string String corresponding to the transform.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: __tostring

Definition at line 136 of file nlua_transform.c.

transformL_translate()

int transformL_translate ( lua_State * L )

static

Applies translation to a transform.

Lua function parameter: Transform T Transform to apply translation to. Lua function parameter: number x X-axis translation. Lua function parameter: number y Y-axis translation. Lua function parameter: number z Z-axis translation. Lua return parameter: Transform A new transformation.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: translate

Definition at line 280 of file nlua_transform.c.

Variable Documentation

transformL_methods

const luaL_Reg transformL_methods[]

static

Initial value:

= {
   { "__tostring", transformL_tostring },
   { "__eq", transformL_eq },
   { "__mul", transformL_mul },
   { "get", transformL_get },
   { "set", transformL_set },
   { "new", transformL_new },
   { "scale", transformL_scale },
   { "translate", transformL_translate },
   { "rotate2d", transformL_rotate2d },
   { "ortho", transformL_ortho },
   { "applyPoint", transformL_applyPoint },
   { "applyDim", transformL_applyDim },
   { 0, 0 } }

Transform metatable methods.

Definition at line 33 of file nlua_transform.c.