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Table of Contents
Version 1.3
This version concentrate on the alpha and transparency in images and how to use it in our game.
Source code
Flashing transparency
Changes to the white pixel
We had to change how we create the Pixel so it supports changes in its alpha-channel. First we specify SurfaceFormat.Color, which tells monogame we want a texture with ARGB format, 8 bit per color channel.
Then we create a new Color(255, 255, 255, 255) where we set R,G,B,A to 255.
Drawing a flashing square
This for loop draws some squares with varying transparency, as can be seen at the topmost part of the green demo. The alpha changes over time.
Please note the BlendState.NonPremultiplied setting, which tells monogame to not do any optimizations for the images' alpha. This allows us to multiply the pixels of the image with a given alpha value, thus making the entire image transparent.
The skulls have no changes in their code except they do not reproduce as quickly anymore.
