de.javagl.simplerenderer
Class RenderingUtils

java.lang.Object
  de.javagl.simplerenderer.RenderingUtils

public class RenderingUtils
extends java.lang.Object

Utility methods for rendering

Method Summary

static java.nio.ByteBuffer	createByteBuffer(int size) Create a direct byte buffer with the given size
static java.nio.ByteBuffer	createDirectBuffer(byte[] a) Create a direct byte buffer which has the contents of the given array.
static java.nio.FloatBuffer	createDirectBuffer(float[] a) Create a direct float buffer which has the contents of the given array.
static java.nio.IntBuffer	createDirectBuffer(int[] a) Create a direct int buffer which has the contents of the given array.
static java.nio.FloatBuffer	createFloatBuffer(int size) Create a direct float buffer with the given size
static java.nio.IntBuffer	createIntBuffer(int size) Create a direct int buffer with the given size
static float[]	identity() Creates an identity matrix
static float[]	multiply(float[] m0, float[] m1) Multiplies the given matrices and returns the result
static float[]	perspective(float fovy, float aspect, float zNear, float zFar) Helper method that creates a perspective matrix
static float[]	rotationX(float angleDeg) Creates a matrix describing a rotation around the x-axis
static float[]	rotationY(float angleDeg) Creates a matrix describing a rotation around the y-axis
static float[]	translation(float x, float y, float z) Creates a translation matrix

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

createByteBuffer

public static java.nio.ByteBuffer createByteBuffer(int size)

Create a direct byte buffer with the given size

Parameters:

size - The size of the buffer

Returns:

The buffer

createFloatBuffer

public static java.nio.FloatBuffer createFloatBuffer(int size)

Create a direct float buffer with the given size

Parameters:

size - The size of the buffer

Returns:

The buffer

createIntBuffer

public static java.nio.IntBuffer createIntBuffer(int size)

Create a direct int buffer with the given size

Parameters:

size - The size of the buffer

Returns:

The buffer

createDirectBuffer

public static java.nio.ByteBuffer createDirectBuffer(byte[] a)

Create a direct byte buffer which has the contents of the given array.

Parameters:

a - The array

Returns:

The buffer

createDirectBuffer

public static java.nio.IntBuffer createDirectBuffer(int[] a)

Create a direct int buffer which has the contents of the given array.

Parameters:

a - The array

Returns:

The buffer

createDirectBuffer

public static java.nio.FloatBuffer createDirectBuffer(float[] a)

Create a direct float buffer which has the contents of the given array.

Parameters:

a - The array

Returns:

The buffer

perspective

public static float[] perspective(float fovy,
                                  float aspect,
                                  float zNear,
                                  float zFar)

Helper method that creates a perspective matrix

Parameters:

fovy - The fov in y-direction, in degrees

aspect - The aspect ratio

zNear - The near clipping plane

zFar - The far clipping plane

Returns:

A perspective matrix

identity

public static float[] identity()

Creates an identity matrix

Returns:

An identity matrix

multiply

public static float[] multiply(float[] m0,
                               float[] m1)

Multiplies the given matrices and returns the result

Parameters:

m0 - The first matrix

m1 - The second matrix

Returns:

The product m0*m1

translation

public static float[] translation(float x,
                                  float y,
                                  float z)

Creates a translation matrix

Parameters:

x - The x translation

y - The y translation

z - The z translation

Returns:

A translation matrix

rotationX

public static float[] rotationX(float angleDeg)

Creates a matrix describing a rotation around the x-axis

Parameters:

angleDeg - The rotation angle, in degrees

Returns:

The rotation matrix

rotationY

public static float[] rotationY(float angleDeg)

Creates a matrix describing a rotation around the y-axis

Parameters:

angleDeg - The rotation angle, in degrees

Returns:

The rotation matrix