MathUtil Class Reference

Copyright 2013 BlackBerry Inc. More...

#include <MathUtil.h>

Static Public Member Functions
static void	smooth (float *x, float target, float elapsedTime, float responseTime)
	Updates the given scalar towards the given target using a smoothing function. More...
local	smooth ( local x, local target, local elapsedTime, local responseTime)
	Updates the given scalar towards the given target using a smoothing function. More...
static void	smooth (float *x, float target, float elapsedTime, float riseTime, float fallTime)
	Updates the given scalar towards the given target using a smoothing function. More...
var	smooth ( var x, var target, var elapsedTime, var riseTime, var fallTime)
	Updates the given scalar towards the given target using a smoothing function. More...
local	smooth ( local x, local target, local elapsedTime, local riseTime, local fallTime)
	Updates the given scalar towards the given target using a smoothing function. More...

Friends
class	Mat4
class	Vec3

Detailed Description

Copyright 2013 BlackBerry Inc.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Original file from GamePlay3D: http://gameplay3d.org

This file was modified to fit the cocos2d-x project Defines a math utility class.

This is primarily used for optimized internal math operations.

Member Function Documentation

static void smooth ( float *  x, float  target, float  elapsedTime, float  responseTime  )

static

Updates the given scalar towards the given target using a smoothing function.

The given response time determines the amount of smoothing (lag). A longer response time yields a smoother result and more lag. To force the scalar to follow the target closely, provide a response time that is very small relative to the given elapsed time.

Parameters

x	the scalar to update.
target	target value.
elapsedTime	elapsed time between calls.
responseTime	response time (in the same units as elapsedTime).

var smooth ( var  x, var  target, var  elapsedTime, var  responseTime  )

static

Updates the given scalar towards the given target using a smoothing function.

The given response time determines the amount of smoothing (lag). A longer response time yields a smoother result and more lag. To force the scalar to follow the target closely, provide a response time that is very small relative to the given elapsed time.

Parameters

x	the scalar to update.
target	target value.
elapsedTime	elapsed time between calls.
responseTime	response time (in the same units as elapsedTime).

local smooth ( local  x, local  target, local  elapsedTime, local  responseTime  )

static

Updates the given scalar towards the given target using a smoothing function.

The given response time determines the amount of smoothing (lag). A longer response time yields a smoother result and more lag. To force the scalar to follow the target closely, provide a response time that is very small relative to the given elapsed time.

Parameters

x	the scalar to update.
target	target value.
elapsedTime	elapsed time between calls.
responseTime	response time (in the same units as elapsedTime).

static void smooth ( float *  x, float  target, float  elapsedTime, float  riseTime, float  fallTime  )

static

Updates the given scalar towards the given target using a smoothing function.

The given rise and fall times determine the amount of smoothing (lag). Longer rise and fall times yield a smoother result and more lag. To force the scalar to follow the target closely, provide rise and fall times that are very small relative to the given elapsed time.

Parameters

x	the scalar to update.
target	target value.
elapsedTime	elapsed time between calls.
riseTime	response time for rising slope (in the same units as elapsedTime).
fallTime	response time for falling slope (in the same units as elapsedTime).

var smooth ( var  x, var  target, var  elapsedTime, var  riseTime, var  fallTime  )

static

Updates the given scalar towards the given target using a smoothing function.

The given rise and fall times determine the amount of smoothing (lag). Longer rise and fall times yield a smoother result and more lag. To force the scalar to follow the target closely, provide rise and fall times that are very small relative to the given elapsed time.

Parameters

x	the scalar to update.
target	target value.
elapsedTime	elapsed time between calls.
riseTime	response time for rising slope (in the same units as elapsedTime).
fallTime	response time for falling slope (in the same units as elapsedTime).

local smooth ( local  x, local  target, local  elapsedTime, local  riseTime, local  fallTime  )

static

Updates the given scalar towards the given target using a smoothing function.

The given rise and fall times determine the amount of smoothing (lag). Longer rise and fall times yield a smoother result and more lag. To force the scalar to follow the target closely, provide rise and fall times that are very small relative to the given elapsed time.

Parameters

x	the scalar to update.
target	target value.
elapsedTime	elapsed time between calls.
riseTime	response time for rising slope (in the same units as elapsedTime).
fallTime	response time for falling slope (in the same units as elapsedTime).

Friends And Related Function Documentation

friend class Mat4

friend

var Mat4

friend

local Mat4

friend

friend class Vec3

friend

var Vec3

friend

local Vec3

friend

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

• /Users/minggo/SourceCode/cocos2d-x/cocos/math/MathUtil.h