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Problem rendering polygons

Started by Ruudje Apr 12, 2005 at 11:57 AM 4 replies 2.2k views

Original Post

Apr 12, 2005 at 11:57 AM

Hi all. A real question this time: I have a class which stores some arrays, providing my program with vertex points and polygon information (which 3 vertices to use for 1 polygon)


	register int i;
	for(i = 0; i < test->GetModelMeshPtr()->i_PolygonCount; i++)
	{
	//glVertex3f(test->GetModelMeshPtr()->Vertices[test->GetModelMeshPtr()->Polygons.x].x, test->GetModelMeshPtr()->Vertices[test->GetModelMeshPtr()->Polygons.x].y, test->GetModelMeshPtr()->Vertices[test->GetModelMeshPtr()->Polygons.x].z);
		//glVertex3f(test->GetModelMeshPtr()->Vertices[test->GetModelMeshPtr()->Polygons.y].x, test->GetModelMeshPtr()->Vertices[test->GetModelMeshPtr()->Polygons.y].y, test->GetModelMeshPtr()->Vertices[test->GetModelMeshPtr()->Polygons.y].z);
		//glVertex3f(test->GetModelMeshPtr()->Vertices[test->GetModelMeshPtr()->Polygons.z].x, test->GetModelMeshPtr()->Vertices[test->GetModelMeshPtr()->Polygons.z].y, test->GetModelMeshPtr()->Vertices[test->GetModelMeshPtr()->Polygons.z].z);

		int v = test->GetModelMeshPtr()->Polygons.x;
		glVertex3f(test->GetModelMeshPtr()->Vertices[v].x, test->GetModelMeshPtr()->Vertices[v].y, test->GetModelMeshPtr()->Vertices[v].z);
		
		v = test->GetModelMeshPtr()->Polygons.y;
		glVertex3f(test->GetModelMeshPtr()->Vertices[v].x, test->GetModelMeshPtr()->Vertices[v].y, test->GetModelMeshPtr()->Vertices[v].z);
		
		v = test->GetModelMeshPtr()->Polygons.z;
		glVertex3f(test->GetModelMeshPtr()->Vertices[v].x, test->GetModelMeshPtr()->Vertices[v].y, test->GetModelMeshPtr()->Vertices[v].z);
	}

Each model-mesh currently is created holding a dummy model, a simple pyramid. The uncommented code works. But the commented code results in compiler errors. Can someone explain to me what is wrong with it, or why it can't be done? Tnx in advance

mike25025

Apr 12, 2005 at 12:01 PM

What errors are you getting?

Ruudje

Author

Ruudje

Apr 12, 2005 at 12:15 PM

Per line of glVertex3f (so times 3) I get:

E:\Game Engine\Main.cpp(26) : error C2108: subscript is not of integral type
E:\Game Engine\Main.cpp(26) : error C2228: left of '.x' must have class/struct/union type
E:\Game Engine\Main.cpp(26) : error C2108: subscript is not of integral type
E:\Game Engine\Main.cpp(26) : error C2228: left of '.y' must have class/struct/union type
E:\Game Engine\Main.cpp(26) : error C2108: subscript is not of integral type
E:\Game Engine\Main.cpp(26) : error C2228: left of '.z' must have class/struct/union type

mike25025

Apr 12, 2005 at 12:21 PM

Try this

glVertex3f(test->GetModelMeshPtr()->Vertices[(int)test->GetModelMeshPtr()->Polygons.x].x,test->GetModelMeshPtr()->Vertices[(int)test->GetModelMeshPtr()->Polygons.x].y,test->GetModelMeshPtr()->Vertices[(int)test->GetModelMeshPtr()->Polygons.x].z);

Ruudje

Author

Ruudje

Apr 12, 2005 at 1:27 PM

It works. Thank you! So, my only failure was that I didn't force it to an integer?

mike25025

Apr 12, 2005 at 1:37 PM

Quote:
Original post by Ruudje
So, my only failure was that I didn't force it to an integer?

Yes. I make this mistake a lot so dont fell bad.

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