158 lines
3.1 KiB
C#
158 lines
3.1 KiB
C#
using System;
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using OpenTK.Graphics.OpenGL;
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using OpenTK.Graphics;
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using OpenTK;
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using org.budnhead.audio;
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namespace org.budnhead.graphics
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{
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public class GLCamera : GLSceneOrientation
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{
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float fov;
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float width, height;
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float aspect;
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Vector3 vPosition,
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vView,
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vTop;
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public GLCamera()
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{
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fov = MathHelper.PiOver2;
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width = 100;
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height = 100;
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aspect = 1;
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vPosition = new Vector3(0,0,1000);
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vView = new Vector3(0,0,-1);
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vTop = new Vector3(0,1,0);
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buildProjection();
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buildMatrices();
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}
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override public void setViewport(int width, int height)
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{
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this.width = (float)width;
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this.height = (float)height;
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buildProjection();
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}
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public void setFoV(float fov){
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this.fov = fov;
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buildProjection();
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}
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private void buildProjection(){
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aspect = width / height;
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_mProjection = Matrix4.CreatePerspectiveFieldOfView(
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fov,
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aspect,
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1.0f,
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100000.0f
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);
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}
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public Vector3 Position
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{
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get { return new Vector3(vPosition); }
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set { this.vPosition = new Vector3(value); buildMatrices(); nhListener.setPosition(this.vPosition);}
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}
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public Vector3 View
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{
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get { return new Vector3(vView); }
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set { this.vView = new Vector3(value).Normalized(); buildMatrices(); nhListener.setView(this.vView); }
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}
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public Vector3 Top
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{
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get { return new Vector3(vTop); }
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set { this.vTop = new Vector3(value).Normalized(); buildMatrices(); nhListener.setTop(this.vTop);}
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}
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private void buildMatrices(){
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Matrix4 mTranslation = Matrix4.CreateTranslation( -this.vPosition );
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Vector3 x,y,z;
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z = -vView;
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x = Vector3.Cross( vTop, z ).Normalized();
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y = Vector3.Cross( z, x );
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Matrix4 mRotation = new Matrix4(
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new Vector4(x,0),
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new Vector4(y,0),
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new Vector4(z,0),
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new Vector4(0,0,0,1)
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);
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mRotation.Transpose();
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_mCamera = mTranslation * mRotation;
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}
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public Vector3 pickRay(float x,float y){
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float y_arc,x_arc;
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x_arc = (( (2*x) ) - width) * aspect;
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y_arc = height - ( (2*y) );
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x_arc /= width;
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y_arc /= height;
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Vector4 ray = new Vector4(x_arc,y_arc,1,1);
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Console.WriteLine("Pick Ray: {0}",ray);
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Matrix4 mpi = _mProjection.Inverted();
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mpi.Transpose();
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ray = mpi * ray;
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ray.Normalize();
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Console.WriteLine("Pick Ray (PROJ): {0}",ray);
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// ray.Z = -1;
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// ray.W = 0;
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//Console.WriteLine("Pick Ray (CAM): {0}",ray);
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Matrix4 mci = _mCamera.Inverted();
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mci.Transpose();
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ray = mci * ray;
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Console.WriteLine("Pick Ray (CAM): {0}",ray);
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//Console.WriteLine("Pick Ray Angles: x:{0} / y:{1}",x_arc,y_arc);
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//ray = Matrix4.CreateRotationY(-y_arc) * Matrix4.CreateRotationX( x_arc ) * ray;
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Vector3 pr = ray.Xyz.Normalized();
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if (pr.Z > 0){
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pr *= -1;
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}
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Console.WriteLine("Pick Ray (World): {0}",pr);
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Console.WriteLine("--------------------------------------------------");
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return pr;
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}
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/**
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* Group of Methods: LookXXXX
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*
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* Arrange Camera to point on/to/...
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*
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**/
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public void lookAt(Vector3 position){
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Vector3 v = position - Position;
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v.Normalize();
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View = v;
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}
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}
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}
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