Class TFB_CollisionPrimitive

Unit

fb_collision_types

Declaration

type TFB_CollisionPrimitive = class(TObject)

Description

Abstract collision primitive class. Notes for implementing an own primitive:

• Implement the TFB_CollisionPrimitive.Intersects function

• Implement an offset matrix, if necessary. It would be intelligent to set it within the constructor (in most cases).

• Setting the fields TFB_CollisionPrimitive.FMinDimension and TFB_CollisionPrimitive.FMinDimension is absolutely necessary. It would be intelligent to do this in the constructor. Do not forget to allow for the offset matrix.

• The intersection point (field FIntersecPoint) must be set at a positive TFB_CollisionPrimitive.Intersects query.

• If your primitive consists of several normals and/or materials, set the relevant one for the current impact at a positive TFB_CollisionPrimitive.Intersects query.

Hierarchy

• TObject
• TFB_CollisionPrimitive

Overview

Fields

	FMinDimension: TFB_Vectorf3;
	FMaxDimension: TFB_Vectorf3;
	FMaterial: TFB_Material;
	FNormal: TFB_Vectorf3;
	FIntersecPoint: TFB_Vectorf3;

Methods

function Intersects(APos1, APos2: TFB_Vectorf3): Boolean; virtual; abstract;

Properties

	property MinDimension: TFB_Vectorf3 read FMinDimension write FMinDimension;
	property MaxDimension: TFB_Vectorf3 read FMaxDimension write FMaxDimension;
	property Material: TFB_Material read FMaterial write FMaterial;
	property Normal: TFB_Vectorf3 read FNormal write FNormal;
	property IntersectionPoint: TFB_Vectorf3 read FIntersecPoint write FIntersecPoint;

Description

Fields

	FMinDimension: TFB_Vectorf3;
Negative boundary point

	FMaxDimension: TFB_Vectorf3;
Positive boundary point

	FMaterial: TFB_Material;
Primitive material

	FNormal: TFB_Vectorf3;
Primitive normal

	FIntersecPoint: TFB_Vectorf3;
Absolute point of the last impact

Methods

	function Intersects(APos1, APos2: TFB_Vectorf3): Boolean; virtual; abstract;
Returns true, if the line intersects the primitive. Parameters APos1 Start point of the line. APos2 End point of the line.

Properties

	property MinDimension: TFB_Vectorf3 read FMinDimension write FMinDimension;
Absolute smallest coordinates of the primitive (maybe with an offset)

	property MaxDimension: TFB_Vectorf3 read FMaxDimension write FMaxDimension;
Absolute largest coordinates of the primitive (maybe with an offset)

	property Material: TFB_Material read FMaterial write FMaterial;
Material of the whole object or the at the place of the last positive collision check

	property Normal: TFB_Vectorf3 read FNormal write FNormal;
Normal at the point of the last positive collision check

	property IntersectionPoint: TFB_Vectorf3 read FIntersecPoint write FIntersecPoint;
Point of last intersection