question about drawing 3D

Hi all I am trying to draw my 3D enemy each time I call the enemy class at random position , but without success :)

That is my drawing code:

Code:

---

  if ((texture != null) && (texture.Meshes.Count > 0))
            {
                Matrix[] transforms = new Matrix[texture.Bones.Count];
                texture.CopyAbsoluteBoneTransformsTo(transforms);
             
                foreach (ModelMesh meshh in texture.Meshes)
                {                 
                    foreach (BasicEffect effect in meshh.Effects)
                    {
                        effect.EnableDefaultLighting();
                        effect.World = transforms[meshh.ParentBone.Index] *
                            Matrix.CreateRotationY(modelRotation)
                            * Matrix.CreateTranslation(position);
                        effect.View = Matrix.CreateLookAt(new Vector3(0.0f, 50.0f, 5000.0f),
                          Vector3.Zero, Vector3.Up);
                        effect.Projection = Matrix.CreatePerspectiveFieldOfView(
                            MathHelper.ToRadians(45.0f), aspectRatio,
                            1.0f, 10000.0f);
                    }                 
                    meshh.Draw();
                }           
            }

---

At this line Matrix.CreateTranslation(position); position is Vector3 an the argument in it are always random:

Code:

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Microsoft.Xna.Framework.Vector3 position = new Microsoft.Xna.Framework.Vector3(random.Next(0, GraphicsDevice.Viewport.Width), random.Next(0,300),1000.0f);
              Enemy  eninit = new Enemy(secondModel, position, 100, 100, 0.5f);

---

But when I call the class 3 times I get 3 models at same coordinates.
This is the whole idea:
http://store.picbg.net/pubpic/30/AF/...34b0a530af.png
But there is one difference now everything on the above picture is 3D !

I suspect the problem isn't in the 3d drawing. If you are getting repeat values from random.Next you are probably defining the random object at too low a level. Instead declare it just once at Form/Class level. BB

Quote:

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Originally Posted by boops boops

I suspect the problem isn't in the 3d drawing. If you are getting repeat values from random.Next you are probably defining the random object at too low a level. Instead declare it just once at Form/Class level. BB

---

Hi boops boops thanks for you comment , but I am not sure that I fully understand you .
What do you mean with

Code:

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from random.Next you are probably defining the random object at too low a level.

---

Where is the random object declared and instantiated?

Quote:

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Originally Posted by mitko29

Hi boops boops thanks for you comment , but I am not sure that I fully understand you .
What do you mean with

Code:

---

from random.Next you are probably defining the random object at too low a level.

---

---

By "too low a level" I mean declaring the random object inside a function instead of under the class name. BB

Quote:

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Originally Posted by boops boops

By "too low a level" I mean declaring the random object inside a function instead of under the class name. BB

---

I don't think that this is the general problem.
How am I suppose to say to xna framework that I wan't to initialize the objects only behind the black line ?

Ok,I did it but now I am trying to apply Bounding Sphere on my 3D model and detect collision.

http://store.picbg.net/pubpic/3F/31/...1563523f31.png

So far so good but I have problem detecting the collision...
Here is the code I use(draw method of enemy) :

Code:

---

public void Draw(GameTime gameTime)
        {
            //if (alive)
            //{                             
            //    spriteBatch.Draw(texture, position, Microsoft.Xna.Framework.Color.Wheat);                               
            //}   
            if ((texture != null) && (texture.Meshes.Count > 0))
            {
                Matrix[] transforms = new Matrix[texture.Bones.Count];
                texture.CopyAbsoluteBoneTransformsTo(transforms);

                foreach (ModelMesh meshh in texture.Meshes)
                {
                    if (sphere.Radius == 0)
                        sphere = meshh.BoundingSphere;
                    else
                        sphere = BoundingSphere.
                                CreateMerged(sphere, meshh.BoundingSphere);
                    DebugShapeRenderer.AddBoundingSphere(meshh.BoundingSphere, Microsoft.Xna.Framework.Color.Red);             
                    foreach (BasicEffect effect in meshh.Effects)
                    {
                        effect.EnableDefaultLighting();
                        enemymat = effect.World = transforms[meshh.ParentBone.Index] *
                            Matrix.CreateRotationY(modelRotation)
                            * Matrix.CreateTranslation(position);                       
                        effect.View = Matrix.CreateLookAt(new Vector3(0.0f, 50.0f, 5000.0f),
                          Vector3.Zero, Vector3.Up);
                        effect.Projection = Matrix.CreatePerspectiveFieldOfView(
                            MathHelper.ToRadians(45.0f), aspectRatio,
                            1.0f, 10000.0f);
                        view1 = Matrix.CreateLookAt(new Vector3(0.0f, 50.0f, 5000.0f),
                          Vector3.Zero, Vector3.Up);
                        projection1 = Matrix.CreatePerspectiveFieldOfView(
                            MathHelper.ToRadians(45.0f), aspectRatio,
                            1.0f, 10000.0f);
                    }                 
                    meshh.Draw();
                    DebugShapeRenderer.AddBoundingSphere(sphere, Microsoft.Xna.Framework.Color.Pink);
                    DebugShapeRenderer.Draw(gameTime, view1, projection1);
                }
                sphere = sphere.Transform(enemymat);
                //sphere.Center = position;
                //sphere.Radius = 0.1f;
         
            }
        }

---

DebugShapeRenderer is the class I am using to draw the sphere !
and here is the code for the player:

Code:

---

protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Microsoft.Xna.Framework.Color.Black);
            if (texture != null)
            {
                spriteBatch.Begin(0, BlendState.Opaque);
                spriteBatch.Draw(texture, new Vector2(0, 0), Microsoft.Xna.Framework.Color.White);
                for (int i = 0; i < shoots.Count; i++)
                {
                    shoots[i].Draw(spriteBatch);
                }
                spriteBatch.End();
                GraphicsDevice.BlendState = BlendState.Opaque;
                GraphicsDevice.DepthStencilState = DepthStencilState.Default;
                #region 3D model tower
                if ((myModel != null) && (myModel.Meshes.Count > 0) && transformation == true)
                {
                    Matrix[] transforms = new Matrix[myModel.Bones.Count];
                    myModel.CopyAbsoluteBoneTransformsTo(transforms);
                    Matrix rotation = Matrix.CreateFromYawPitchRoll(-yaw, -pitch, roll);
                    Matrix translation = Matrix.CreateTranslation(
                    modelTransformaton.V03, modelTransformaton.V13, -modelTransformaton.V23);
                    Matrix scaling = Matrix.CreateScale(90);
                    foreach (ModelMesh mesh in myModel.Meshes)
                    {
                        if (modelsp.Radius == 0)
                            modelsp = mesh.BoundingSphere;
                        else
                            modelsp = BoundingSphere.
                                    CreateMerged(modelsp, mesh.BoundingSphere);
                        DebugShapeRenderer.AddBoundingSphere(mesh.BoundingSphere, Microsoft.Xna.Framework.Color.Green);
                        foreach (BasicEffect effect in mesh.Effects)
                        {
                            effect.EnableDefaultLighting();
                          world =  effect.World = Matrix.CreateLookAt(
                        new Microsoft.Xna.Framework.Vector3(0, 0, 3),
                            Microsoft.Xna.Framework.Vector3.Zero,
                            Microsoft.Xna.Framework.Vector3.Up);

                            effect.View = transforms[mesh.ParentBone.Index] *
                            Matrix.CreateScale(1 / mesh.BoundingSphere.Radius)
                            * scaling * rotation * translation;
                            effect.Projection = Matrix.CreatePerspective(
                            1, 1 / GraphicsDevice.Viewport.AspectRatio, 1f, 10000);

                            view1 = transforms[mesh.ParentBone.Index] *
                            Matrix.CreateScale(1 / mesh.BoundingSphere.Radius)
                            * scaling * rotation * translation;

                            projection1 = Matrix.CreatePerspective(
                            1, 1 / GraphicsDevice.Viewport.AspectRatio, 1f, 10000);

                            pos = Matrix.Invert(translation).Translation;

                        }
                        mesh.Draw();
                        DebugShapeRenderer.AddBoundingSphere(modelsp, Microsoft.Xna.Framework.Color.Beige);
                        DebugShapeRenderer.Draw(gameTime, view1, projection1);
                    }
                    //modelsp.Center = pos;
                    //modelsp.Radius = 0.5f;
                    modelsp = modelsp.Transform(view1);

                }
                #endregion
                for (int i = 0; i < enemies.Count; i++)
                {
                    enemies[i].Draw(gameTime);
                }
            }
            base.Draw(gameTime);
        }

---

This way I am trying to detect collision:

Code:

---

for (int i = enemies.Count - 1; i >= 0; i--)
            {
                enemies[i].Update(gameTime);
                if (enemies[i].sphere.Intersects(modelsp))
                {
                    enemies[i].Speed = 0.0f;
                }
                if (enemies[i].Alive == false)
                {
                    enemies.RemoveAt(i);
                }
            }

---

Where enemies is List<Enemy> and Enemy is the class.
Any ideas what am I doing wrong ?