Mit dieser Klasse erstelle ich den Raycast
Code: Alles auswählen
public class MouseRay
{
public vec3 CurrentRay { get; set; }
public mat4 ProjectionMatrix { get; set; }
public mat4 ViewMatrix { get; set; }
public Camera Camera { get; set; }
public MouseRay(Camera camera)
{
this.Camera = camera;
}
private void GenerateMatrix(Camera camera)
{
vec3 cameraPosition = camera.Location.ToGlmVec3();
Vec3 cameraFront = Utils.CalculateCameraFront2(camera);
ProjectionMatrix = mat4.Perspective(Utils.ToRadians(45.0f), camera.Size.X / camera.Size.Y, camera.Near, camera.Far);
ViewMatrix = mat4.LookAt(cameraPosition, cameraPosition + cameraFront.ToGlmVec3(), new vec3(0.0f, 1.0f, 0.0f));
}
public Vec3 RayCast(float mouseX, float mouseY, Viewport viewport)
{
this.GenerateMatrix(this.Camera);
var ndc = GetNDC(mouseX, mouseY, viewport);
var clip = new vec4(ndc.x, ndc.y, -1f, 1f);
var eye = GetEyeCords(clip);
vec3 ray_wor = GetWorldCords(eye);
return new Vec3(ray_wor);
}
private vec3 GetWorldCords(vec4 eye)
{
vec3 rey_wor = (ViewMatrix.Inverse * eye).xyz;
return rey_wor.Normalized;
}
public vec4 GetEyeCords(vec4 clip)
{
vec4 ray_eye = ProjectionMatrix.Inverse * clip;
return new vec4(ray_eye.x, ray_eye.y, -1f, 0f);
}
public vec2 GetNDC(float x, float y, Viewport viewport)
{
float ndcX = (2.0f * x) / viewport.Width - 1.0f;
float ndcY = 1.0f - (2.0f * y) / viewport.Height;
return new vec2(ndcX, -ndcY);
}
}
Code: Alles auswählen
start = this.Camera.Location;
end = MouseRay.RayCast(e.X, e.Y, Viewport);
foreach (var layer in this.Scene.Layer)
{
foreach (var entity in layer.Elements)
{
StaticMeshBehavior staticMeshBehavior = (StaticMeshBehavior)entity.GetBehavior<StaticMeshBehavior>();
if (staticMeshBehavior != null)
{
Genesis.Physics.Aabb aabb = Genesis.Physics.Aabb.FromBulletRigidBody(staticMeshBehavior.RigidBody);
if (Genesis.Physics.Aabb.IntersectRay(start, end, aabb.Min, aabb.Max))
{
MessageBox.Show("contact");
}
}
}
}
Beste grüße
Andy
