[Python-ogre-commit] SF.net SVN: python-ogre: [511] trunk/python-ogre/demos/showcase_01/texture. py

[<bha...@us...>]

Revision: 511
          http://python-ogre.svn.sourceforge.net/python-ogre/?rev=511&view=rev
Author:   bharling
Date:     2007-12-17 10:04:21 -0800 (Mon, 17 Dec 2007)

Log Message:
-----------
Updated to the latest version of the showcase demo. 

A little speed improvement.

-bharling

Added Paths:
-----------
    trunk/python-ogre/demos/showcase_01/texture.py

Added: trunk/python-ogre/demos/showcase_01/texture.py
===================================================================
--- trunk/python-ogre/demos/showcase_01/texture.py	                        (rev 0)
+++ trunk/python-ogre/demos/showcase_01/texture.py	2007-12-17 18:04:21 UTC (rev 511)
@@ -0,0 +1,79 @@
+import ogre.renderer.OGRE as ogre
+import ctypes
+import SampleFramework as sf
+
+class textureListener(ogre.FrameListener):
+    def __init__(self, app):
+        ogre.FrameListener.__init__(self)
+        self.app = app
+        self.grnVal = 0
+        self.fading = True
+        
+    def frameStarted(self, frameEvent):
+        self.grnVal = self.fading and self.grnVal + 1 or self.grnVal -1
+        if self.grnVal == 255:
+            self.fading = False
+        elif self.grnVal == 0:
+            self.fading = True
+        colArray = [0,self.grnVal,0,128] * 16 * 16
+        self.app.setTextureManual(self.app.mTex, 16,16, colArray)
+        return True
+        
+        
+class textureTest(sf.Application):
+    def __init__(self):
+        sf.Application.__init__(self)
+        
+    def _createScene(self):
+        self.mTex = ogre.TextureManager.getSingleton().createManual(
+                                "DynamicTexture",
+                                ogre.ResourceGroupManager.DEFAULT_RESOURCE_GROUP_NAME,
+                                ogre.TEX_TYPE_2D,
+                                16, 16,
+                                0,
+                                ogre.PF_BYTE_BGRA,
+                                ogre.TU_DEFAULT)
+        colArray = [0,255,0,128] * 16 * 16
+        self.setTextureManual(self.mTex, 16, 16, colArray)
+        self.material = ogre.MaterialManager.getSingleton().create(
+                            "DynamicTextureMaterial",
+                            ogre.ResourceGroupManager.DEFAULT_RESOURCE_GROUP_NAME)
+                            
+        self.material.getTechnique(0).getPass(0).createTextureUnitState("DynamicTexture")
+        self.material.getTechnique(0).getPass(0).setSceneBlending(ogre.SBT_TRANSPARENT_ALPHA)
+        self.ent = self.sceneManager.createEntity("mrben", "knot.mesh")
+        self.ent.setMaterialName("DynamicTextureMaterial")
+        self.node = self.sceneManager.rootSceneNode.createChildSceneNode('Knot3Node', (-100, -10, -200))
+        self.node.attachObject(self.ent)
+        
+        self.lstnr = textureListener(self)
+        ogre.Root.getSingleton().addFrameListener(self.lstnr)
+        
+    #Texture is a manually created Texture 
+    #dataArray is an array of pixel colour data 
+    def setTextureManual(self, texture, width, height, dataArray): 
+            import ctypes 
+            # Get the pixel buffer 
+            pixelBuffer = texture.getBuffer() 
+            # Lock the pixel buffer and get a pixel box 
+            pointer = pixelBuffer.lock(0,width*height,ogre.HardwareBuffer.HBL_NORMAL) 
+            #number 4 here is use to accommodate the bytes for r, g, b, a may vary with different pixel formats 
+            storageclass = ctypes.c_uint8 * (width*height*4) 
+            cbuffer=storageclass.from_address(ogre.CastInt(pointer)) 
+            pos=0 
+            for j in range(height): 
+                for i in range( width ) : 
+                    cbuffer[pos]= dataArray[pos] # B 
+                    pos+=1 
+                    cbuffer[pos]= dataArray[pos]  # G 
+                    pos+=1 
+                    cbuffer[pos]= dataArray[pos]  # R 
+                    pos+=1 
+                    cbuffer[pos]= dataArray[pos]   # A 
+                    pos+=1 
+            # Unlock the pixel buffer 
+            pixelBuffer.unlock()
+            
+if __name__=='__main__':
+    ta = textureTest()
+    ta.go()
\ No newline at end of file


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