Off-piste simulator: Tracks

The winter is just around the corner. If you, as myself, enjoying alpine winter sports, this little toy will get you into the mood. Imagine that you have climbed all the way up the mountain, before the lifts starts feeding the mountain with people. You want to be sure that you get a ride on fresh untouched snow all the way down. You now standing on the top and watching the sun rise behind a nearby peak. Googles on. Gears on the back. It’s you and the mountain… I love that feeling!

This is the first part of this experiment of making a off-piste simulator/game in Away3D. The first step is to create the slope and generate tracks in the snow. Check it out the first test

I got inspired by @tonylukasavage and his morphing mesh experiments with HeightMapModifier in Away3D.

Some notes about the texture; I start of with a bitmap filled with the color-value 0x80000. That fill represents the center of the offset. I then draw the track to another BitmapData ranging from black to red. To make the scrolling effect I found a method that I’m never used before: BitmapData.scroll(x,y). The two layers is comped together to a single bitmap. One advantage of using layers is that I can add noise, shadows and other effects to each layer. The heightmap is then converted to a normalmap with NormalMapUtil and a texture with paletteMap. Now I got what I need to create a nice phong-shaded Pixelbender material. The grid has very few triangles (25×25 segments), I have to save some cpu for the character and the other stuff. I’m not doing any real-time triangulations either, so in some cases the vertices starts to jump around. I have to accept that for now.

I don’t really know the outcome of all the future parts yet, but next up is to add a character and some controls.