private void button1_Click(object sender, EventArgs e)
{
//read the stl file
objects = new ArrayList();
StreamReader sr = new StreamReader("stl.txt");
while (!sr.EndOfStream)
{
stlObj currentObj = new stlObj();
//obj layer
string currentLine = sr.ReadLine().ToUpper();
if (currentLine.Contains("SOLID"))
{
currentObj.name = currentLine.Substring(currentLine.IndexOf("SOLID") + 6); //find name
}
else
{
Console.WriteLine("invalid format error");
}
while (!currentLine.Contains("ENDSOLID"))
{
facet curretFacet = new facet();
currentLine = sr.ReadLine().ToUpper();
if (currentLine.Contains("FACET"))
{
sr.ReadLine();//outer loop
//p1
currentLine = sr.ReadLine();
string[] components = currentLine.Split(new char[0], StringSplitOptions.RemoveEmptyEntries);
curretFacet.points[0] = new point(components[1], components[2], components[3]);
currentLine = sr.ReadLine();
components = currentLine.Split(new char[0], StringSplitOptions.RemoveEmptyEntries);
curretFacet.points[1] = new point(components[1], components[2], components[3]);
currentLine = sr.ReadLine();
components = currentLine.Split(new char[0], StringSplitOptions.RemoveEmptyEntries);
curretFacet.points[2] = new point(components[1], components[2], components[3]);
sr.ReadLine(); //end loop
sr.ReadLine(); //endfacet
//this is to ensure the triangle is facing the correct direction
}
else
{
Console.WriteLine("invalid format error");
}
currentObj.facets.Add(curretFacet);
currentObj.facetNum++;
}
objects.Add(currentObj);
loaded = true;
}
}
private void draw()
{
xPos += 0.1;
//GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
displayBackground();
float far = 500, near = 100f;
OpenTK.Matrix4 RTMat = new OpenTK.Matrix4(
rotateArr[0], rotateArr[1], rotateArr[2], translateArr[0],
rotateArr[3], rotateArr[4], rotateArr[5], translateArr[1],
rotateArr[6], rotateArr[7], rotateArr[8], translateArr[2],
0, 0, 0, 1);
OpenTK.Matrix4 reverse = new OpenTK.Matrix4(
1, 0, 0, 0,
0, -1, 0, 0,
0, 0, -1, 0,
0, 0, 0, 1);
//not sure if needed
OpenTK.Matrix4 landscape = new OpenTK.Matrix4(
0, 1, 0, 0,
-1, 0, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1);
OpenTK.Matrix4 projection = new OpenTK.Matrix4(
2 * cameraPar[0] / 816f, 0, 1 - (2 * cameraPar[2] / 816f), 0,
0, 2 * cameraPar[4] / 612f, -1 + (2 * cameraPar[5] + 2) / 612f, 0,
0, 0, -(far + near) / (far - near), -2 * far * near / (far - near),
0, 0, -1, 0);
OpenTK.Matrix4 projT = new OpenTK.Matrix4(
2 * cameraPar[0] / 816f, 0, 1 - (2 * cameraPar[2] / 816f), 0,
0, 2 * cameraPar[4] / 612f, -1 + (2 * cameraPar[5] + 2) / 612f, 0,
0, 0, -(far + near) / (far - near), -2 * far * near / (far - near),
0, 0, -1, 0);
projT.Transpose();
OpenTK.Matrix4 mvMat = OpenTK.Matrix4.Mult(reverse, RTMat);
OpenTK.Matrix4 projMat2 = OpenTK.Matrix4.Mult(landscape, projection);
OpenTK.Matrix4 mvp = OpenTK.Matrix4.Mult(projection, mvMat);
// render graphics
GL.MatrixMode(MatrixMode.Projection);
GL.LoadIdentity();
GL.LoadMatrix(ref projT.Row0.X);
mvMat.Transpose();
GL.MatrixMode(MatrixMode.Modelview);
GL.LoadIdentity();
GL.LoadMatrix(ref mvMat.Row0.X);
GL.LineWidth(2.5f);
GL.PolygonMode(MaterialFace.FrontAndBack, PolygonMode.Line);
GL.Color3(Color.Green);
GL.Begin(PrimitiveType.Lines);
GL.Vertex3(0, 0, 0);
GL.Vertex3(0, 0, 100);
GL.End();
GL.Color3(Color.Aqua);
GL.Begin(PrimitiveType.Lines);
GL.Vertex3(0, 0, 0);
GL.Vertex3(0, 100, 0);
GL.Color3(Color.Yellow);
GL.Begin(PrimitiveType.Lines);
GL.Vertex3(0, 0, 0);
GL.Vertex3(100, 0, 0);
GL.End();
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
GL.Enable(EnableCap.Blend);
Color a = Color.FromArgb(160, 255, 0, 0);
Color b = Color.FromArgb(160, 225, 25, 25);
Color c = Color.FromArgb(160, 195, 50, 50);
Color black = Color.FromArgb(0, 0, 0);
GL.Enable(EnableCap.DepthTest);
GL.DepthFunc(DepthFunction.Lequal);
GL.LineWidth(1.0f);
foreach (stlObj obj in objects)
{
object[] facetArray = obj.facets.ToArray();
for (int i = 0; i < obj.facetNum - 1; i++)
{
GL.PolygonMode(MaterialFace.FrontAndBack, PolygonMode.Fill);
Object fcet = (facet)facetArray[i];
GL.Begin(PrimitiveType.Triangles);
facet fct = (facet)fcet;
GL.Color4(a);
GL.Vertex3(fct.points[0].x + xPos, fct.points[0].y, fct.points[0].z);
GL.Color4(b);
GL.Vertex3(fct.points[1].x + xPos, fct.points[1].y, fct.points[1].z);
GL.Color4(c);
GL.Vertex3(fct.points[2].x + xPos, fct.points[2].y, fct.points[2].z);
GL.End();
/*
* GL.PolygonMode(MaterialFace.FrontAndBack, PolygonMode.Line);
* GL.Color3(black);
* GL.Begin(PrimitiveType.Triangles);
* GL.Vertex3(fct.points[0].x , fct.points[0].y, fct.points[0].z );
* GL.Vertex3(fct.points[1].x , fct.points[1].y, fct.points[1].z );
* GL.Vertex3(fct.points[2].x , fct.points[2].y, fct.points[2].z );
*
* GL.End();
*/
}
}
GL.Disable(EnableCap.Blend);
glControl1.Refresh();// redraws and updates
glControl1.SwapBuffers();
}
