/*
* FOLLOWING CODE HAS BEEN DIRECTLY ADDED FROM
* TOPIC4, WHICH WAS FOUND ON LEARNIT!
* Only very minor changes has been made to adjust
* for a change in programming language.
*/
private void DrawObjs()
{
Vertex v1, v2, v3;
Vertex n1, n2, n3;
var TexCoord = new double[2];
// Enable Texturing and setup.
GL.Enable(EnableCap.Texture2D);
var skyGraphics = skybox.GraphicsObj;
List <Triangle> skyboxTriangles = graphController.GetShape(skyGraphics.ShapeIndex);
//DrawSkyBox(); // Currently a background (not working)
GL.Enable(EnableCap.Lighting);
for (int j = 0; j < drawObjList.Count; j++)
{
var curSimObj = drawObjList[j];
Graphics.GraphicsObject curGraphObj = curSimObj.GraphicsObj;
List <Triangle> shape = graphController.GetShape(curGraphObj.ShapeIndex);
if (j < 7)
{
GL.BindTexture(TextureTarget.Texture2D, textureIds[j]);
}
else
{
GL.BindTexture(TextureTarget.Texture2D, textureIds[7]);
}
for (int i = 0; i < shape.Count; i++)
{
v1 = curGraphObj.vertices[shape[i].vi1];
v2 = curGraphObj.vertices[shape[i].vi2];
v3 = curGraphObj.vertices[shape[i].vi3];
n1 = curGraphObj.normals[shape[i].ni1];
n2 = curGraphObj.normals[shape[i].ni2];
n3 = curGraphObj.normals[shape[i].ni3];
GL.Begin(PrimitiveType.Triangles);
GL.TexCoord2(v1.u, v1.v);
GL.Normal3(n1.x, n1.y, n1.z);
GL.Vertex3(v1.x, v1.y, v1.z);
GL.TexCoord2(v2.u, v2.v);
GL.Normal3(n2.x, n2.y, n2.z);
GL.Vertex3(v2.x, v2.y, v2.z);
GL.TexCoord2(v3.u, v3.v);
GL.Normal3(n3.x, n3.y, n3.z);
GL.Vertex3(v3.x, v3.y, v3.z);
GL.End();
}
}
}
private void TransformObjs(List <Matrix4> transMatrix)
{
for (int simIndex = 0; simIndex < drawObjList.Count; simIndex++)
{
Graphics.GraphicsObject gObj = drawObjList[simIndex].GraphicsObj;
Matrix4 curTransMat = transMatrix[simIndex];
TransformObj(gObj, curTransMat);
}
}
public void ReadObjFile(String filename)
{
List <Vertex> newVertices = new List <Vertex>();
List <Vertex> newNormals = new List <Vertex>();
List <Triangle> newTriangles = new List <Triangle>();
using (System.IO.StreamReader streamReader = new System.IO.StreamReader(filename))
{
String curLine = "";
String[] curLineData;
// Neccessary for double string conversion.
// This is due to commas being used instead of punctuation in some cultures.
System.Globalization.NumberFormatInfo numFormat =
System.Globalization.CultureInfo.GetCultureInfo("en-US").NumberFormat;
while (!streamReader.EndOfStream)
{
curLine = streamReader.ReadLine();
curLineData = curLine.Split(' ');
switch (curLineData[0])
{
case "v":
{
Vertex newVertex = new Vertex();
newVertex.x = Double.Parse(curLineData[1], numFormat);
newVertex.y = Double.Parse(curLineData[2], numFormat);
newVertex.z = Double.Parse(curLineData[3], numFormat);
double[] texCoords = GetTextureCoord(newVertex.x, newVertex.y, newVertex.z);
newVertex.u = texCoords[0];
newVertex.v = texCoords[1];
newVertices.Add(newVertex);
break;
}
case "vn":
{
Vertex newNormal = new Vertex();
newNormal.x = Double.Parse(curLineData[1], numFormat);
newNormal.y = Double.Parse(curLineData[2], numFormat);
newNormal.z = Double.Parse(curLineData[3], numFormat);
newNormals.Add(newNormal);
break;
}
case "f":
{
Triangle newTriangle = new Triangle();
StringBuilder strSanitizer = new StringBuilder();
/*
* Creates a stringbuilder to edit input data for easier manipulation.
* The string sanitizer creates a new string where all values are seperated
* by '/', and then resplits that string into a new array.
*/
strSanitizer.Append(curLineData[1] + '/' + curLineData[2] + '/' + curLineData[3]);
strSanitizer.Replace("//", "/");
String[] vertice_normal_array = strSanitizer.ToString().Split('/');
// Conversion from .obj files 1-indexing to ordinary programming happens here.
newTriangle.vi1 = Int32.Parse(vertice_normal_array[0]) - 1;
newTriangle.ni1 = Int32.Parse(vertice_normal_array[1]) - 1;
newTriangle.vi2 = Int32.Parse(vertice_normal_array[2]) - 1;
newTriangle.ni2 = Int32.Parse(vertice_normal_array[3]) - 1;
newTriangle.vi3 = Int32.Parse(vertice_normal_array[4]) - 1;
newTriangle.ni3 = Int32.Parse(vertice_normal_array[5]) - 1;
strSanitizer.Clear();
newTriangles.Add(newTriangle);
break;
}
default: throw new ArgumentException("Input file contains line not starting with v, vn, or f. Please check input.");
}
}
}
GraphicsObject newGraphObj = new GraphicsObject(newVertices, newNormals, shapeIndex);
this.gfxObjs.Add(newGraphObj);
this.shapes.Add(newTriangles);
shapeIndex++;
}