Swyter's Simple Waving
I've created some simple functions for Star Wars Conquest, this can be used for almost anything, with some adjustments you can convert the code into a windy flora script or even waving cloth or water. Uses the passed time_var uniform from the game. I've tested it in Mount&Blade 1.011 but should work on any DirectX 3D game.
In definitive, it's a good start point for a complex effect or simply to start learning HLSL.
// vPosition, tc.y <-- Vertex + vertical texture coordinate as modulator float4 CalcVertexAnimationMaster(float4 Offset, float height) { return float4( (cos( time_var + Offset.y ) * .05 ) + Offset.x, Offset.y, (sin( time_var + Offset.y ) * .05 ) + Offset.z, Offset.w ); }
And then call that function from within any Vertex Shader you want using something like this:
vPosition = CalcVertexAnimationMaster(vPosition,tc.y);
[edit] These are variations of the same function:
This one is modulated by the UV map, higher the texture coordinate in the texture map, stronger the waving intensity... (Help by Vincenzo)
// vPosition, tc.y <-- Vertex + vertical texture coordinate as modulator float4 CalcVertexAnimationMaster(float4 Offset, float height) { static const float yeffect = 1.0f; float offsetx = (cos( time_var + Offset.y ) * 0.05f ) * (-height * yeffect); float offsetz = (sin( time_var + Offset.y ) * 0.05f ) * (-height * yeffect); return float4( Offset.x + offsetx, Offset.y, Offset.z + offsetz, Offset.w ); }
This one animates only the vertices covered by the bottom part of the UV map.
float4 CalcVertexAnimationMaster(float4 Offset, float height) { if (height >= .5) { return Offset; } else { return float4( (cos( time_var + Offset.y ) /*height*/*.05 ) + Offset.x, Offset.y, (sin( time_var + Offset.y ) /*height*/*.05 ) + Offset.z, Offset.w ); } }
[edit] Source
I published it originally here: http://forums.taleworlds.com/index.php/topic,208694.msg5040943.html#msg5040943
