/// <summary>
/// Extension method for <see cref="IViewCamera"/> to get view matrix.
/// </summary>
/// <param name="camera"></param>
/// <returns></returns>
public static GlmNet.mat4 GetViewMat4(this IViewCamera camera)
{
GlmNet.vec3 position = ToVec3(camera.Position);
GlmNet.vec3 target = ToVec3(camera.Target);
GlmNet.vec3 up = ToVec3(camera.UpVector);
GlmNet.mat4 lookAt = GlmNet.glm.lookAt(position, target, up);
return(lookAt);
}
internal static Point ScreenToWorld(Point screenPoint, IEditorNode i)
{
// converts it to vec3
GlmNet.vec3 scrPt = Utilities.PointToVec3(screenPoint);
// project from screen to world location this point, according to the current
// projection_view matrix.
GlmNet.vec3 unprojectedPoint1 = GlmNet.glm.unProject(
scrPt,
i.GetModel(),
Camera.Instance().GetProjectionView(),
Camera.Instance().GetViewport());
// converts to point
return(new Point((int)unprojectedPoint1.x, (int)unprojectedPoint1.y));
}
public vec3(vec3 v)
{
this.x = v.x;
this.y = v.y;
this.z = v.z;
}
// TODO: this is actually defined as an extension, put in the right file.
public static mat4 rotate(float angle, vec3 v)
{
return(rotate(mat4.identity(), angle, v));
}
public vec2(vec3 v)
{
this.x = v.x;
this.y = v.y;
}