Gorilla.Material.Grass

Unit Gorilla.Material.Grass.pas

Classes

TGorillaGrassMaterial = class ( TGorillaDefaultMaterial )
TGorillaGrassMaterialSource = class ( TGorillaDefaultMaterialSource )

Constants

const GORILLA_GLSL_DEFINE_GRASS : string = "GRASS";

TGorillaGrassMaterial

The grass material implements a shader which applies a texture to billboard elements built with TGorillaBillboard component. The shader also moves vertices less than 0.0 on x and z axis by sin and cos functions to simulate some kind of waving grass. Those waving mechanism can be manipulated by the Speed and Amplitude value.

Ancestors

-TGorillaDefaultMaterial

-TCustomMaterial

-TMaterial

-TObject

Members

Methods

public constructor Create ( const ASource : TGorillaDefaultMaterialSource ) ;
public destructor Destroy ( ) ;
protected procedure DoApply ( const Context : TContext3D ) ; override;
protected procedure DoCreateTexturePool ( ) ; override;
protected procedure DoCreateVertexShader ( ) ; override;
protected procedure DoSetupVertexShader ( ) ; override;
protected procedure DoCreateFragmentShader ( ) ; override;
protected procedure DoSetupFragmentShader ( ) ; override;

Properties

public Speed : Single
Get or set the speed of waving grass. By this property you can simulate wind speed.
read FSpeed
write FSpeed
public Amplitude : Single
Get or set the maximum amplitude of waving grass. The larger this value, the more waving the grass is.
read FAmplitude
write FAmplitude
public Spot : TPoint3D
Get or set the position of an obstacle to simulate bending of grass.
read FSpot
write FSpot
public SpotRadius : Single
Get or set radius of obstacle which is used to simulate bending of grass.
read FSpotRadius
write FSpotRadius
public SpotEnabled : Boolean
Enables or disables an obstacle.
read FSpotEnabled
write FSpotEnabled
public CutoutLevel : Single
This shader discards fragments at a certain transparency level.
read FCutoutLevel
write FCutoutLevel

TGorillaGrassMaterialSource

The grass material source implements a shader which applies a texture to billboard elements built with TGorillaBillboard component. The shader also moves vertices less than 0.0 on x and z axis by sin and cos functions to simulate some kind of waving grass. Those waving mechanism can be manipulated by the Speed and Amplitude value.

Remarks

By the bitmap-pool it is possible to declare multiple textures for more variety in billboard element display. In most cases grass with a single texture do not look very realistic.

Ancestors

-TGorillaDefaultMaterialSource

-TMaterialSource

-TFmxObject

-TComponent

-TPersistent

-TObject

Members

Methods

public constructor Create ( AOwner : TComponent ) ;
public destructor Destroy ( ) ;
protected function GetSpeed ( ) : Single ;
protected procedure SetSpeed ( const AValue : Single ) ;
protected function GetAmplitude ( ) : Single ;
protected procedure SetAmplitude ( const AValue : Single ) ;
protected function GetSpot ( ) : TPoint3D ;
protected procedure SetSpot ( const AValue : TPoint3D ) ;
protected function GetSpotRadius ( ) : Single ;
protected procedure SetSpotRadius ( const AValue : Single ) ;
protected function GetSpotEnabled ( ) : Boolean ;
protected procedure SetSpotEnabled ( const AValue : Boolean ) ;
protected function GetCutoutLevel ( ) : Single ;
protected procedure SetCutoutLevel ( const AValue : Single ) ;
protected procedure DoCreateBitmapPool ( ) ; override;
protected function CreateMaterial ( ) : TMaterial ; override;

Properties

published Speed : Single
Get or set the speed of waving grass. By this property you can simulate wind speed.
read GetSpeed
write SetSpeed
published Amplitude : Single
Get or set the maximum amplitude of waving grass. The larger this value, the more waving the grass is.
read GetAmplitude
write SetAmplitude
published Spot : TPoint3D
Get or set the position of an obstacle to simulate bending of grass.
read GetSpot
write SetSpot
published SpotRadius : Single
Get or set radius of obstacle which is used to simulate bending of grass.
read GetSpotRadius
write SetSpotRadius
published SpotEnabled : Boolean
Enables or disables an obstacle.
read GetSpotEnabled
write SetSpotEnabled
published CutoutLevel : Single
Get or set the cutout alpha level where fragments are discarded by shader to produce better transparency effects.
read GetCutoutLevel
write SetCutoutLevel