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programBoy

Problems calculating true normals

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I've made this function to calculate true normals:
Bvertex Bmap::RetNormal(int w, int h) {

	Bvertex n1, n2, n3, n, face1;
	if (w < 0) w = 0; if (h < 0) h = 0;

	n1 = CreateVertex(w, h);
	n2 = CreateVertex(w - step, h);
	n3 = CreateVertex(w - step, h + step);
	n = bFunctions::Normal(n1, n2, n3);

	n1 = CreateVertex(w, h);
	n2 = CreateVertex(w - step, h + step);
	n3 = CreateVertex(w, h + step);
	face1 = bFunctions::Normal(n1, n2, n3);
	AddVertex(&n, face1);
	
	n1 = CreateVertex(w, h);
	n2 = CreateVertex(w, h + step);
	n3 = CreateVertex(w + step, h + step);
	face1 = bFunctions::Normal(n1, n2, n3);
	AddVertex(&n, face1);
	
	n1 = CreateVertex(w, h);
	n2 = CreateVertex(w + step, h + step);
	n3 = CreateVertex(w + step, h);
	face1 = bFunctions::Normal(n1, n2, n3);
	AddVertex(&n, face1);
	
	n1 = CreateVertex(w, h);
	n2 = CreateVertex(w + step, h);
	n3 = CreateVertex(w + step, h - step);
	face1 = bFunctions::Normal(n1, n2, n3);
	AddVertex(&n, face1);
	
	n1 = CreateVertex(w, h);
	n2 = CreateVertex(w + step, h - step);
	n3 = CreateVertex(w, h - step);
	face1 = bFunctions::Normal(n1, n2, n3);
	AddVertex(&n, face1);
	
	n1 = CreateVertex(w, h);
	n2 = CreateVertex(w, h - step);
	n3 = CreateVertex(w - step, h + step);
	face1 = bFunctions::Normal(n1, n2, n3);
	AddVertex(&n, face1);
	
	n1 = CreateVertex(w, h);
	n2 = CreateVertex(w - step, h - step);
	n3 = CreateVertex(w - step, h);
	face1 = bFunctions::Normal(n1, n2, n3);
	AddVertex(&n, face1);

	n = bFunctions::Normalize(n);
	
	return n;
}



I'm sorry for the less comments.. :) But it doesn't work, i get a kind of weird lighting. I call it in this way:
LoadNormalCoord(w, h, &faces[0], &faces[1]);	// Load the right vertexes into the memory
/*--- Render first triangle ---*/
face = faces[0];						// Put in face the first face

glNormal(RetNormal(w, h));
glVertex(face.v1);						// Render top-left part

glNormal(RetNormal(w+1, h));
glVertex(face.v2);						// Render top-right part

glNormal(RetNormal(w+1, h+1));
glVertex(face.v3);						// Render down-right part



/*--- Render second triangle ---*/

face = faces[1];						// Put in face the second face

glNormal(RetNormal(w, h));
glVertex(face.v1);						// Render top-left part again

glNormal(RetNormal(w+1, h+1));
glVertex(face.v2);						// Render down-right part again

glNormal(RetNormal(w, h+1));
glVertex(face.v3);						// Render down-left part



What am i doing wrong? The calculation of normals doesn't contain any errors (it works with flat normals). Thanks in advance.. [Edited by - programBoy on October 8, 2004 9:22:49 AM]

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