LoadBrush Rotate 180 Degrees
Blitz3D Forums/Blitz3D Programming/LoadBrush Rotate 180 Degrees
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| Id like to rotate the image screen1.bmp and then have brush1 store it brush1 = LoadBrush("screen1.bmp") how can i rotate the above by 180 degrees |
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| The most obvious straightforward way is to rotate it in a graphics application. |
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| i need rotate this while program is running |
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| Use the RotateTexture command or the RotateImage command. |
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| http://www.blitzbasic.com/b3ddocs/command.php?name=GetBrushTexture&ref=3d_cat |
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| couldnt get the RotateTexture command or the RotateImage to work for the line brush1 = LoadBrush("screen1.bmp") any ideas |
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Graphics3D 640,480
cam = CreateCamera()
MoveEntity cam,0,0,-4
br = LoadBrush("dirty.png")
cube = CreateCube()
PaintEntity cube,br
tex = GetBrushTexture(br)
While Not KeyDown(1)
RotateTexture tex,ang
ang = ang +1
RenderWorld
Flip
Wend
End |
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| im trying to rotate a screenshot image it does not seem to rotate while running screen1image = LoadBrush("screen1.bmp") RotateTexture screen1image,180 i need to do this outside the loop main loop how can i save the rotated image back to screen1image thanks |
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| Are you rotating an image that is the entire size of your display (ie. 640x480, etc)? |
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| the image can be any bmp im using bmp at the moment |
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| The Blitz command RotateImage cites: "This command is not fast enough to render rotations in real time!". If you are doing large images, maybe it's just taking a while.......... Possible solution, is to pre-rotate the images you are going to use, and then use them as needed. Of course, you'll want to free up the extra images when you're through using them. |
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| I do not need a real time rotation. and i dont want to rotate the bmp in photoshop before hand ill try and explain the situation ok i have a image a bmp 800x600 at 0 degrees now before my main loop in the game i need to turn this bmp 180 degrees and save to variable brush1 = LoadBrush("screen1.bmp") basically the image is upside down and need to turn it thanks guys |
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| You can do a pixel-by-pixel fast copy on locked buffers with this loop For x = 0 to 800 For y = 0 to 600 CopyPixelFast(x,y,ImageBuffer(source_image),800-x,600-y) Next Next This is probably as fast a 180 degree rotation as you'll get. If you want to flip the image rather than rotate, lose the '800-x' in the destination parameter and just use 'x'. However B3D's 2D blitting performance seems weak to me. The manual example of this still takes a few milliseconds to copy half a screen of data. I'm unsure why you're wanting to do this. If the image is upside down, why not reverse it before loading it? If the image is the right way up but appears upside down on screen, you're likely drawing your object wrong, such as it being inside out, upside down, or just having wrong UV coords. Or are wanting a copy of the image, so you've right way up and flipped available at the same time? |
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| @jimmyx - You can't rotate a brush. A brush is just a collection of visible attributes that can be applied to something, and which can include a texture. You need to rotate the actual texture image by specifying the texture's handle in the 'RotateTexture' command. Either explicitly load the texture, using the 'LoadTexture' command, and save the texture handle returned by LoadTexture into an integer variable for later use; or use 'GetBrushTexture' to get a handle to a brush's texture. Note that 'GetBrushTexture' actually creates a new instance of a texture, which you will need to destroy using 'FreeTexture' when you are done with it. eg. (Untested) texture_handle = Loadtexture( "mytexture.jpg" ) RotateTexture texture_handle, angle# -- brush_handle = LoadBrush( "mytexture.jpg" ) texture_handle = GetBrushTexture( brush_handle ) RotateTexture texture_handle, angle# FreeTexture texture_handle |
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| im going to try this one hope it works , thanks |
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