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jPCT-AE - a 3d engine for Android => Support => Topic started by: fooyou on June 25, 2013, 12:21:00 pm
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Hi ! EgonOlsen! and everyone ! I have question to consult ! I want to know if JPCT support dynamic textures? for example .
I get a model ,rabbit with skin a animation made by 3ds Max tool ! and it was mapped a texture ,a image. especially, when playing the animation . it needs change texture UV ,in other words !a same part of an Objcet3D (not all Object3D), at different time ,it should have different texture. just like a people undress a clothes and show the inside clothes.
thks!
Fooyou!
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Yes, you can do that. The best way is to put the textures in one texture atlas (i.e. stuff them all togther in one texture) and switch them by using a texture matrix (http://www.jpct.net/jpct-ae/doc/com/threed/jpct/Object3D.html#setTextureMatrix(com.threed.jpct.Matrix) (http://www.jpct.net/jpct-ae/doc/com/threed/jpct/Object3D.html#setTextureMatrix(com.threed.jpct.Matrix))) or you can change uv-mapping at runtime using the PolygonManager and compile it using Object3D.compile(true, true);(http://www.jpct.net/jpct-ae/doc/com/threed/jpct/Object3D.html#compile(boolean, boolean) (http://www.jpct.net/jpct-ae/doc/com/threed/jpct/Object3D.html#compile(boolean, boolean)))
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Thank you for reply! EgonOlsen! I will have a try!
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Hi ! I come back ! I cant resolve the problem ! I cant let it work fine ! then I have try 2 suggestion what your gave me! But , it looks some trouble . First , I use method setTextureMatrix(mat) ,I dont know how to get the Matrix value ? where does the value come from? How do I calculate the value, if I should know accurate coordination of UV coords? My artist just gave me a model and a texture image ,but coordination . in addition , I dont know which animation frame and when need change matrix . because of no animation sequence info from my artist !
https://docs.google.com/file/d/0By_KX7XayXSlQlp3OUh0R25ZMHM/edit?pli=1
here is my demo resource , a compress file contain a video showing the animation and an Android APK file of my demo project , at last , an image file UV texture . could you help me , take you a few minutes to see . maybe U can understand what I said! note the video , there is a rabbit winking , the eyes of the rabbit should show different image ,a star when winking ! but my apk cant do that!
Thank you !
by Fooyou
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The matrix is a normal transformation matrix, i.e. the uv-values will be multiplied with it. Reading your post again, it might not be appropriate for your task. However, i'm not 100% sure what you actually want to do. Do want to change uv-coordinates or parts of the texturing but without changing uv (your clothes example implies this) or do you want to change the complete texture?
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yep！ I just want to change parts of the texturing ， not to change the complete texture！ for example , the mouth of the rabbit or the head of the rabbit when playing animation at different frame ! does it can be work ??