public override void draw(Graphics graphics, Camera camera, WorldLights worldLights)
{
if (Settings.debug)
{
Vector4D centerVector = Vector4D.Zero();
centerVector.LeftMultiply(StaticMatrices.TranslationMatrix(position));
centerVector.LeftMultiply(camera.View);
distanceToCamera = (float)centerVector.getMagnitude();
centerVector.LeftMultiply(camera.Frustum);
centerVector.divideByW();
centerVector.moveOriginToCenterScreen();
Matrix4 mat = camera.Frustum * camera.View * StaticMatrices.TranslationMatrix(position) * StaticMatrices.ScaleMatrix(new Vector3D(intensity * .0005, intensity * .0005, intensity * .0005));
Vector4D[] vertices = GameShapes.Tetrahedron();
for (int i = 0; i < 4; i++)
{
vertices[i].LeftMultiply(mat);
vertices[i].divideByW();
vertices[i].moveOriginToCenterScreen();
}
PointF[] pointsAll = vertices.Select(x => x.getPointXY()).ToArray();
graphics.DrawLine(new Pen(Color.FromArgb((int)red, (int)green, (int)blue), 2), pointsAll[0], pointsAll[1]);
graphics.DrawLine(new Pen(Color.FromArgb((int)red, (int)green, (int)blue), 2), pointsAll[0], pointsAll[2]);
graphics.DrawLine(new Pen(Color.FromArgb((int)red, (int)green, (int)blue), 2), pointsAll[0], pointsAll[3]);
graphics.DrawLine(new Pen(Color.FromArgb((int)red, (int)green, (int)blue), 2), pointsAll[1], pointsAll[2]);
graphics.DrawLine(new Pen(Color.FromArgb((int)red, (int)green, (int)blue), 2), pointsAll[1], pointsAll[3]);
graphics.DrawLine(new Pen(Color.FromArgb((int)red, (int)green, (int)blue), 2), pointsAll[2], pointsAll[3]);
graphics.DrawString((intensity * .001).ToString() + "K", new Font("Arial", 12), new SolidBrush(Color.White), centerVector.getPointXY());
}
}
/// <summary>
/// preDraw is called by the graphics engine before object Z-sorting is done. It get's everything ready for drawing.
/// </summary>
/// <param name="graphics">GDI graphics to use</param>
/// <param name="camera">Camera to use</param>
/// <param name="worldLights">Set of lights to use</param>
/// <param name="rotation">Rotation of mesh</param>
/// <param name="scale">Scale of mesh</param>
/// <param name="position">Position of mesh</param>
public void preDraw(Graphics graphics, Camera camera, WorldLights worldLights, Vector3D rotation, Vector3D scale, Vector3D position)
{
#region Generate transform matrices
Matrix4 ViewProjectionMatrix = camera.Frustum * camera.View;
Matrix4 WorldTransformMatrix = StaticMatrices.TranslationMatrix(position)
* StaticMatrices.RotationMatrixZYX(rotation) * StaticMatrices.ScaleMatrix(scale);
#endregion
#region Start with vertices in object (local) space
for (int i = 0; i < dynamicVertices.Length; i++)
{
dynamicVertices[i].setVector(staticVertices[i]);
}
#endregion
#region Transform vertices to world space (combinining the scale, rotation, and position matrices)
foreach (Vector4D vertex in dynamicVertices)
{
vertex.LeftMultiply(WorldTransformMatrix);
}
#endregion
#region Calculate lighting from world lights
/// Have yet to test whether parallel is actually faster, so leaving original code:
//foreach (FaceGDI face in faces)
// face.calculateWorldLighting(dynamicVertices, worldLights, position);
Parallel.For(0, faces.Length, i =>
{
faces[i].calculateWorldLighting(dynamicVertices, worldLights, position);
});
#endregion
#region Transform vertices to view space (combining camera view and frustum transforms)
foreach (Vector4D vertex in dynamicVertices)
{
/// Transforms vertex into camera space and applies frustum matrix
vertex.LeftMultiply(ViewProjectionMatrix);
/// Creates the illusion of perspective, shringing the x, y, and z values based on the original z value, as stored in w.
vertex.divideByW();
/// Required to compensate for GDI's upper-left-hand corner origin - could be done elsewhere - maybe doesn't need to be done for each vertex each frame - look into it.
vertex.moveOriginToCenterScreen();
}
#endregion
// Faces are now ready to draw. This last bit is for the Z-Sorting and distance read out and stuff.
#region Calculate render position and distance from camera
renderPositionGDI.zero();
renderPositionGDI.LeftMultiply(WorldTransformMatrix);
renderPositionGDI.LeftMultiply(camera.View);
distanceFromCamera = (float)renderPositionGDI.getMagnitude();
if (Settings.debug)
{
renderPositionGDI.LeftMultiply(camera.Frustum);
renderPositionGDI.divideByW();
renderPositionGDI.moveOriginToCenterScreen();
}
#endregion
}