wxErlang

Reference Manual

Version 1.9

Table of Contents

glu

Module

glu

Module Summary

A part of the standard OpenGL Utility api.

Description

A part of the standard OpenGL Utility api. See www.khronos.org

Booleans are represented by integers 0 and 1.

DATA TYPES

enum() = non_neg_integer()

See wx/include/gl.hrl or glu.hrl

matrix() = matrix12() | matrix16()

matrix12() = {float(), float(), float(), float(), float(), float(), float(), float(), float(), float(), float(), float()}

matrix16() = {float(), float(), float(), float(), float(), float(), float(), float(), float(), float(), float(), float(), float(), float(), float(), float()}

mem() = binary() | tuple()

Memory block

vertex() = {float(), float(), float()}

Exports

tesselate(Normal, Vs::[Vs]) -> {Triangles, VertexPos}

Types

Normal = vertex()
Vs = vertex()
Triangles = [integer()]
VertexPos = binary()

General purpose polygon triangulation. The first argument is the normal and the second a list of vertex positions. Returned is a list of indecies of the vertices and a binary (64bit native float) containing an array of vertex positions, it starts with the vertices in Vs and may contain newly created vertices in the end.

build1DMipmapLevels(Target, InternalFormat, Width, Format, Type, Level, Base, Max, Data) -> integer()

Types

Target = enum()
InternalFormat = integer()
Width = integer()
Format = enum()
Type = enum()
Level = integer()
Base = integer()
Max = integer()
Data = binary()

Builds a subset of one-dimensional mipmap levels

glu:build1DMipmapLevels builds a subset of prefiltered one-dimensional texture maps of decreasing resolutions called a mipmap. This is used for the antialiasing of texture mapped primitives.

See external documentation.

build1DMipmaps(Target, InternalFormat, Width, Format, Type, Data) -> integer()

Types

Target = enum()
InternalFormat = integer()
Width = integer()
Format = enum()
Type = enum()
Data = binary()

Builds a one-dimensional mipmap

glu:build1DMipmaps builds a series of prefiltered one-dimensional texture maps of decreasing resolutions called a mipmap. This is used for the antialiasing of texture mapped primitives.

See external documentation.

build2DMipmapLevels(Target, InternalFormat, Width, Height, Format, Type, Level, Base, Max, Data) -> integer()

Types

Target = enum()
InternalFormat = integer()
Width = integer()
Height = integer()
Format = enum()
Type = enum()
Level = integer()
Base = integer()
Max = integer()
Data = binary()

Builds a subset of two-dimensional mipmap levels

glu:build2DMipmapLevels builds a subset of prefiltered two-dimensional texture maps of decreasing resolutions called a mipmap. This is used for the antialiasing of texture mapped primitives.

See external documentation.

build2DMipmaps(Target, InternalFormat, Width, Height, Format, Type, Data) -> integer()

Types

Target = enum()
InternalFormat = integer()
Width = integer()
Height = integer()
Format = enum()
Type = enum()
Data = binary()

Builds a two-dimensional mipmap

glu:build2DMipmaps builds a series of prefiltered two-dimensional texture maps of decreasing resolutions called a mipmap. This is used for the antialiasing of texture-mapped primitives.

See external documentation.

build3DMipmapLevels(Target, InternalFormat, Width, Height, Depth, Format, Type, Level, Base, Max, Data) -> integer()

Types

Target = enum()
InternalFormat = integer()
Width = integer()
Height = integer()
Depth = integer()
Format = enum()
Type = enum()
Level = integer()
Base = integer()
Max = integer()
Data = binary()

Builds a subset of three-dimensional mipmap levels

glu:build3DMipmapLevels builds a subset of prefiltered three-dimensional texture maps of decreasing resolutions called a mipmap. This is used for the antialiasing of texture mapped primitives.

See external documentation.

build3DMipmaps(Target, InternalFormat, Width, Height, Depth, Format, Type, Data) -> integer()

Types

Target = enum()
InternalFormat = integer()
Width = integer()
Height = integer()
Depth = integer()
Format = enum()
Type = enum()
Data = binary()

Builds a three-dimensional mipmap

glu:build3DMipmaps builds a series of prefiltered three-dimensional texture maps of decreasing resolutions called a mipmap. This is used for the antialiasing of texture-mapped primitives.

See external documentation.

checkExtension(ExtName, ExtString) -> 0 | 1

Types

ExtName = string()
ExtString = string()

Determines if an extension name is supported

glu:checkExtension returns ?GLU_TRUE if ExtName is supported otherwise ?GLU_FALSE is returned.

See external documentation.

cylinder(Quad, Base, Top, Height, Slices, Stacks) -> ok

Types

Quad = integer()
Base = float()
Top = float()
Height = float()
Slices = integer()
Stacks = integer()

Draw a cylinder

glu:cylinder draws a cylinder oriented along the z axis. The base of the cylinder is placed at z = 0 and the top at z=height. Like a sphere, a cylinder is subdivided around the z axis into slices and along the z axis into stacks.

See external documentation.

deleteQuadric(Quad) -> ok

Types

Quad = integer()

Destroy a quadrics object

glu:deleteQuadric destroys the quadrics object (created with glu:newQuadric/0 ) and frees any memory it uses. Once glu:deleteQuadric has been called, Quad cannot be used again.

See external documentation.

disk(Quad, Inner, Outer, Slices, Loops) -> ok

Types

Quad = integer()
Inner = float()
Outer = float()
Slices = integer()
Loops = integer()

Draw a disk

glu:disk renders a disk on the z = 0 plane. The disk has a radius of Outer and contains a concentric circular hole with a radius of Inner . If Inner is 0, then no hole is generated. The disk is subdivided around the z axis into slices (like pizza slices) and also about the z axis into rings (as specified by Slices and Loops , respectively).

See external documentation.

errorString(Error) -> string()

Types

Error = enum()

Produce an error string from a GL or GLU error code

glu:errorString produces an error string from a GL or GLU error code. The string is in ISO Latin 1 format. For example, glu:errorString(?GLU_OUT_OF_MEMORY) returns the string out of memory.

See external documentation.

getString(Name) -> string()

Types

Name = enum()

Return a string describing the GLU version or GLU extensions

glu:getString returns a pointer to a static string describing the GLU version or the GLU extensions that are supported.

See external documentation.

lookAt(EyeX, EyeY, EyeZ, CenterX, CenterY, CenterZ, UpX, UpY, UpZ) -> ok

Types

EyeX = float()
EyeY = float()
EyeZ = float()
CenterX = float()
CenterY = float()
CenterZ = float()
UpX = float()
UpY = float()
UpZ = float()

Define a viewing transformation

glu:lookAt creates a viewing matrix derived from an eye point, a reference point indicating the center of the scene, and an UP vector.

See external documentation.

newQuadric() -> integer()

Create a quadrics object

glu:newQuadric creates and returns a pointer to a new quadrics object. This object must be referred to when calling quadrics rendering and control functions. A return value of 0 means that there is not enough memory to allocate the object.

See external documentation.

ortho2D(Left, Right, Bottom, Top) -> ok

Types

Left = float()
Right = float()
Bottom = float()
Top = float()

Define a 2D orthographic projection matrix

glu:ortho2D sets up a two-dimensional orthographic viewing region. This is equivalent to calling gl:ortho/6 with near=-1 and far=1.

See external documentation.

partialDisk(Quad, Inner, Outer, Slices, Loops, Start, Sweep) -> ok

Types

Quad = integer()
Inner = float()
Outer = float()
Slices = integer()
Loops = integer()
Start = float()
Sweep = float()

Draw an arc of a disk

glu:partialDisk renders a partial disk on the z=0 plane. A partial disk is similar to a full disk, except that only the subset of the disk from Start through Start + Sweep is included (where 0 degrees is along the +f2yf axis, 90 degrees along the +x axis, 180 degrees along the -y axis, and 270 degrees along the -x axis).

See external documentation.

perspective(Fovy, Aspect, ZNear, ZFar) -> ok

Types

Fovy = float()
Aspect = float()
ZNear = float()
ZFar = float()

Set up a perspective projection matrix

glu:perspective specifies a viewing frustum into the world coordinate system. In general, the aspect ratio in glu:perspective should match the aspect ratio of the associated viewport. For example, aspect=2.0 means the viewer's angle of view is twice as wide in x as it is in y. If the viewport is twice as wide as it is tall, it displays the image without distortion.

See external documentation.

pickMatrix(X, Y, DelX, DelY, Viewport) -> ok

Types

X = float()
Y = float()
DelX = float()
DelY = float()
Viewport = {integer(), integer(), integer(), integer()}

Define a picking region

glu:pickMatrix creates a projection matrix that can be used to restrict drawing to a small region of the viewport. This is typically useful to determine what objects are being drawn near the cursor. Use glu:pickMatrix to restrict drawing to a small region around the cursor. Then, enter selection mode (with gl:renderMode/1 ) and rerender the scene. All primitives that would have been drawn near the cursor are identified and stored in the selection buffer.

See external documentation.

project(ObjX, ObjY, ObjZ, Model, Proj, View) -> {integer(), WinX::float(), WinY::float(), WinZ::float()}

Types

ObjX = float()
ObjY = float()
ObjZ = float()
Model = matrix()
Proj = matrix()
View = {integer(), integer(), integer(), integer()}

Map object coordinates to window coordinates

glu:project transforms the specified object coordinates into window coordinates using Model , Proj , and View . The result is stored in WinX , WinY , and WinZ . A return value of ?GLU_TRUE indicates success, a return value of ?GLU_FALSE indicates failure.

See external documentation.

quadricDrawStyle(Quad, Draw) -> ok

Types

Quad = integer()
Draw = enum()

Specify the draw style desired for quadrics

glu:quadricDrawStyle specifies the draw style for quadrics rendered with Quad . The legal values are as follows:

See external documentation.

quadricNormals(Quad, Normal) -> ok

Types

Quad = integer()
Normal = enum()

Specify what kind of normals are desired for quadrics

glu:quadricNormals specifies what kind of normals are desired for quadrics rendered with Quad . The legal values are as follows:

See external documentation.

quadricOrientation(Quad, Orientation) -> ok

Types

Quad = integer()
Orientation = enum()

Specify inside/outside orientation for quadrics

glu:quadricOrientation specifies what kind of orientation is desired for quadrics rendered with Quad . The Orientation values are as follows:

See external documentation.

quadricTexture(Quad, Texture) -> ok

Types

Quad = integer()
Texture = 0 | 1

Specify if texturing is desired for quadrics

glu:quadricTexture specifies if texture coordinates should be generated for quadrics rendered with Quad . If the value of Texture is ?GLU_TRUE, then texture coordinates are generated, and if Texture is ?GLU_FALSE, they are not. The initial value is ?GLU_FALSE.

See external documentation.

scaleImage(Format, WIn, HIn, TypeIn, DataIn, WOut, HOut, TypeOut, DataOut) -> integer()

Types

Format = enum()
WIn = integer()
HIn = integer()
TypeIn = enum()
DataIn = binary()
WOut = integer()
HOut = integer()
TypeOut = enum()
DataOut = mem()

Scale an image to an arbitrary size

glu:scaleImage scales a pixel image using the appropriate pixel store modes to unpack data from the source image and pack data into the destination image.

See external documentation.

sphere(Quad, Radius, Slices, Stacks) -> ok

Types

Quad = integer()
Radius = float()
Slices = integer()
Stacks = integer()

Draw a sphere

glu:sphere draws a sphere of the given radius centered around the origin. The sphere is subdivided around the z axis into slices and along the z axis into stacks (similar to lines of longitude and latitude).

See external documentation.

unProject(WinX, WinY, WinZ, Model, Proj, View) -> {integer(), ObjX::float(), ObjY::float(), ObjZ::float()}

Types

WinX = float()
WinY = float()
WinZ = float()
Model = matrix()
Proj = matrix()
View = {integer(), integer(), integer(), integer()}

Map window coordinates to object coordinates

glu:unProject maps the specified window coordinates into object coordinates using Model , Proj , and View . The result is stored in ObjX , ObjY , and ObjZ . A return value of ?GLU_TRUE indicates success; a return value of ?GLU_FALSE indicates failure.

See external documentation.

unProject4(WinX, WinY, WinZ, ClipW, Model, Proj, View, NearVal, FarVal) -> {integer(), ObjX::float(), ObjY::float(), ObjZ::float(), ObjW::float()}

Types

WinX = float()
WinY = float()
WinZ = float()
ClipW = float()
Model = matrix()
Proj = matrix()
View = {integer(), integer(), integer(), integer()}
NearVal = float()
FarVal = float()

See unProject/6

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