How can I draw things in the foreground with pygame? With things I mean a text that I draw with .blit. Because I have a floor that hides the text I want to show How could I fix that?
blit draw one image onto another. Therefore you must draw the text after the floor:
screen.blit(floor, floor_pos)
screen.blit(text, text_pos)
First you draw the foreground, then the text.
Related
I have an hourglass like vector shape and I'd like to use it to mask an image. I'd like to feather the edges - have a soft falloff in transparency that follows the contours of the hour glass. Any ideas how I can do this?
I tried using a gradient fill on a closed shape (using beginGradientFill() and curveTo() functions) but that falloff doesn't follow the contour of the vector shape, it can only go one direction.
Maybe there is a better solution but until somebody comes up with it... I assume you could do the following:
Draw whatever shape you want to use as mask into a transparent bitmap.
Scale a bit the bitmap down (or use a matrix while drawing its bitmapdata).
Apply a blur filter to it.
Put the bitmap's center to the masked clip's center so they are aligned.
Set the masked clip's cacheAsBitmap property to true.
I'm doing some collision detection with a circle and a square and whenever the circle comes in contact with the square it bounces away changing its X coordinate by *-1. However, the Hit Area of the circle is a square, so even when it collides with the white area around the circle , the affect still occurs.
My question is, is there a way to modify the hit area to closer resemble my circle?
Thanks
Bitmap hit testing is pixel based (instead of boundary-based, like Sprite-based hit testing), so it is inherently more precise.
Here are the Adobe docs on it.
Here is a nice tutorial on it.
And here is a nice code snippet on it:
if (firstObjectBitmapData.hitTest(new Point(firstObject.x, firstObject.y), 255, secondObjectBitmapData, new Point(secondObject.x, secondObject.y), 255))
{
trace("hit!");
}
Tell me how I should scale shadow mask to create an animation change of the phase of the moon, please?
As in the example in the upper right corner: http://astro.unl.edu/naap/lps/animations/lps.swf
You should be able to do this quite easily using a Shape tween.
There are lots of tutorials on the web.
The author dynamically draws in a mask MC ( beginFill(), lineTo() and curveTo() ) over a graphic shadow.
I have a BitmapData object named myBitmapData. It was loaded of PNG of size 104x104. This PNG represents a red circle on the transparent background.
There is also a Sprite object named myBackground. I want render that red circle into myBackground.
myBackground.graphics.beginBitmapFill(myBitmapData);
myBackground.graphics.drawRect(0, 0, myBitmapData.width, myBitmapData.height);
myBackground.graphics.endFill();
addChild(myBackground);
Everything is fine. I see a red circle in the left top of myBackground.
But when I change the third line to
myBackground.graphics.drawRect(0, 52, myBitmapData.width, myBitmapData.height);
and expect my circle to be translated 52 pixels down, I actually obtain something strange (for me :)): there are two red half-circles (they form like hourglass).
So, the question is: how do I render myBitmapData into the random position of myBackground?
P.S.
In the case of
myBackground.graphics.drawRect(0, 104, myBitmapData.width, myBitmapData.height);
it is circle again :)
This is caused by beginBitmapFill's default repeat = true parameter. There's an example in the docs. Disabling the repetition won't work though, you'd just get a half circle then.
There are several ways to fix this:
Use a Matrix with a translation (displacement) as argument in beginBitmapFill.
Draw the rectangle at 0,0 on another Sprite, and move that sprite to where you want it on the background.
Don't draw directly to the background, but to another bitmap using copyPixels. Then fill the background with that bitmap.
Is this possible? For example if I have an animation that draws 1 rectangle, and then after 5 seconds it draws a second one, can I target the first one and do something like change its color?
What you'll have to do is clear the canvas, draw the 1st rectangle in another color, and then draw the second one.