Given a U and V value, transform that to 3D coordinates

Blitz3D Forums/Blitz3D Programming/Given a U and V value, transform that to 3D coordinates

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Leadwerks
 #1
It mostly comes down to a pointintriangle() function. Something like this...

Function TFormTextureCoords(u#,v#,mesh)
For s=1 To CountSurfaces(mesh)
	surf=GetSurface(mesh,1)
	For t=0 To CountTriangles(surf)-1
		a=TriangleVertex(surf,t,0)
		b=TriangleVertex(surf,t,1)
		c=TriangleVertex(surf,t,2)
		au#=VertexU(surf,a)
		av#=VertexV(surf,a)
		bu#=VertexU(surf,b)
		bv#=VertexV(surf,b)
		cu#=VertexU(surf,c)
		cv#=VertexV(surf,c)
		If PointInTriangle(u,v,au,av,bu,bv,cu,cv)
			TFormPoint x#,y#,z#,0,0
			Return True
			EndIf
		Next
	Next
Return False
End Function

Function PointInTriangle(x#,y#,Ax#,Ay#,Bx#,By#,Cx#,Cy#)

End Function