Game Development Reference
In-Depth Information
Figure 6-6.
Smoke demo in action
Creating the textures
To create the 64
×
64 textures for the smoke particles, I have simply used some noise with a radial
gradient as layer mask. The result is shown in Figure 6-7.
Figure 6-7.
Individual smoke sprites
Implementing the emitter
The emitter for smoke is very similar to the one we used to create the fire effect. This makes a lot of sense
because they are both simulating hot gas! To make the smoke a bit more interesting, we will emit it from
the cursor. So our emitter will get the x, y coordinates of the mouse rather than the dimensions of the
canvas we used in the fire emitter. As all the textures now have the same size, the code to make smaller
