rotation prob

dazscott · 2005-03-15T13:49:11

I have a tile based map which I want to render in 3 layers. layer1. base tile 2. static models and 3. animated models. When I render a static model on a particular tile, it seems to render in the right place and it gets redrawn in the right place when I scroll the screen. The problem is I want to rotate the model to face a different direction so I use Matrix.RotationX(angleX) to rotate the model, but when I scroll the screen the model is not drawn on the right tile. Here is the code involved. thanks in advance for any help on this. map class important snippets //initialise tiles public void initTiles(int noTiles) { //set base tile value for(int i = 0;i < noTiles;i++) { TileClass tile = new TileClass(); tile.setValue(0,0); tiles.Add(tile); } //set layer 2 values for static Models TileClass setTile = (TileClass) tiles[470]; setTile.setValue(1,1); tiles[470] = setTile; } public void renderMapTiles() { //render horizontally for(int y = 0; y < mapHeight; y++) { //render vertically for(int x = 0; x < mapWidth; x++) { //figure out the tile to display TileClass ti = new TileClass(); ti = (TileClass) tiles[x + (y * mapWidth)]; tileToRender = ti.getValue(0); //calculate the position xPos = (0.7f * x) + xPosChange; yPos = (0.7f * y) + yPosChange; //int[] adjacency = adjBuffer.Read(typeof(int), //set the position of the tile and render renderTile(xPos,yPos); //render the second layer if need be if(ti.getValue(1) != 0) { tentMesh.setPos(xPos,yPos,0.0f); tentMesh.rotate(10,10,0); tentMesh.DrawMesh(ref device); } } } } public void renderTile(float xPos,float yPos) { // Draw the Mesh //DrawMesh(xPos, yPos, 0.0f,0); grassMesh.setPos(xPos,yPos,0.0f); grassMesh.DrawMesh(ref device); } /// <summary> /// We will initialize our graphics device here /// </summary> public void InitializeGraphics() { // Set our presentation parameters PresentParameters presentParams = new PresentParameters(); presentParams.Windowed = true; presentParams.SwapEffect = SwapEffect.Discard; presentParams.AutoDepthStencilFormat = DepthFormat.D16; presentParams.EnableAutoDepthStencil = true; // Create our device device = new Device(0, DeviceType.Hardware, this, CreateFlags.SoftwareVertexProcessing, presentParams); // Load our meshes grassMesh.LoadMesh(@"..\..\worldagrassa.x",ref device); tentMesh.LoadMesh(@"..\..\tent.x",ref device); tentMesh.rotate(100,100,100); //LoadMesh(@"..\..\worldagrassa.x"); //LoadMesh(@"..\..\tent.x"); } public class StaticMesh { private Mesh mesh = null; private Material[] meshMaterials; private Texture[] meshTextures; //vars to handle rotation matrix private float angleX,angleY,angleZ; private float posX,posY,posZ; private Matrix meshView; public StaticMesh() { meshView = Matrix.Zero; } public void LoadMesh(string file,ref Device device) { ExtendedMaterial[] mtrl; // Load our mesh mesh = Mesh.FromFile(file, MeshFlags.Managed, device, out mtrl); // If we have any materials, store them if ((mtrl != null) && (mtrl.Length > 0)) { meshMaterials = new Material[mtrl.Length]; meshTextures = new Texture[mtrl.Length]; // Store each material and texture for (int i = 0; i < mtrl.Length; i++) { meshMaterials = mtrl.Material3D; if ((mtrl.TextureFilename != null) && (mtrl.TextureFilename != string.Empty)) { // We have a texture, try to load it meshTextures = TextureLoader.FromFile(device, @"..\..\" + mtrl.TextureFilename); } } } } // public void DrawMesh(float x, float y, float z,ref Device device) // { // // device.Transform.World = Matrix.Translation(x,y,z) * meshView; // //Matrix.Translation(x,y,z) * Matrix.RotationX(rotX) * Matrix.RotationY(rotY) * Matrix.RotationZ(rotZ); // for (int i = 0; i < meshMaterials.Length; i++) // { // device.Material = meshMaterials; // device.SetTexture(0, meshTextures); // mesh.DrawSubset(i); // } // // } public void DrawMesh(ref Device device) { device.Transform.World = Matrix.Translation(posX,posY,posZ)* Matrix.RotationX(angleX) * Matrix.RotationY(angleY)* Matrix.RotationZ(angleZ); for (int i = 0; i < meshMaterials.Length; i++) { device.Material = meshMaterials; device.SetTexture(0, meshTextures); mesh.DrawSubset(i); } } public void setPos(float x, float y, float z) { posX = x; posY = y; posZ = z; } public void rotate(float x,float y,float z) { angleX = x; angleY = y; angleZ = z; } } }

Graphics and GPU Programming Programming

Started by dazscott March 08, 2005 10:36 AM

13 comments, last by turnpast 19 years, 1 month ago

dazscott

122

Author

March 12, 2005 09:16 AM

Here is how it is at the moment. It sits in the right place, but its facing the wrong direction. I'd like to have the open section of the tent facing the opposite way, but I cant seem to get it to rotate that way. I am using the World matrix to handle scrolling by changing the xPos and yPos variables. hope I've made things clearer.Thanks again for the help.

using this code.

//to set position and rotation	tentMesh.setPos(xPos,yPos,0.0f);							tentMesh.rotate(0f /(float)Math.PI ,4.7f / (float)Math.PI, 0f / (float)Math.PI);							tentMesh.DrawMesh(ref device);//to draw        device.Transform.World = Matrix.RotationYawPitchRoll(angleX, angleY, angleZ) * Matrix.Translation(posX,posY,posZ);

[Edited by - dazscott on March 14, 2005 11:16:01 AM]

King_DuckZ

128

March 12, 2005 09:51 AM

you linked the picture to your local hard drive... :)

[ King_DuckZ out-- ]

turnpast

1,011

March 12, 2005 01:08 PM

Ok, I cannot see your picture, but I can say this: Use the View matrix for scrolling and the world matrix for positioning. Trying to use just the world matrix to do everyting is going to lead to no end of troubles for you.

dazscott

122

Author

March 14, 2005 12:10 PM

I fixed up the links to the images. any suggestions on how I can get the tent to face the opposite direction? when I increase the yaw rotation this happens.

pitch is set to 4.7f thats how I got it to face roof side up.
So how can I get it to rotate on the axis I want? thanks guys
code same as previous post.

turnpast

1,011

March 15, 2005 01:49 PM

I'm sorry, you are probably just going to have to play with it until you get it right. Are you sure that you mean 4.7/PI and not PI/4.7?

rotation prob

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