Oolite Bulletins

DaddyHoggy wrote:

Woot!!! (They're not Thargoids - but I like 'em!)

Commander McLane wrote:

A suggestion: scrap the second ring of arms, let there be only eight, and the mouth underneath. But, more important: Would it be possible with shaders to make the arms move up and down? That would be cool! :shock:

Ahruman wrote:

Commander McLane wrote:

A suggestion: scrap the second ring of arms, let there be only eight, and the mouth underneath. But, more important: Would it be possible with shaders to make the arms move up and down? That would be cool!

Possible, but difficult. The normal way to do this would be a skeletal animation system: you lay out a bunch of jointed rods, define the relationship of each vertex to the rods, and animate the rods to deform the mesh. There’s no way to do this in Oolite, though, so you’d need to calculate the animation of each vertex based only on its original position. The only animation of this type done for Oolite to date is Griff’s recoiling turrets, and that’s a lot easier.

struct appdata 
{
	float4 position : POSITION;
	float4 color	: COLOR0;
	float3 wave	: COLOR1;
};

struct vfconn
{
	float4 HPos	: POSITION;
	float4 Col0	: COLOR0;
};

vfconn main(appdata IN,	uniform float4x4 ModelViewProj)
{
	vfconn OUT;			// Variable to handle our output from the vertex
					// shader (goes to a fragment shader if available).

	// Change The Y Position Of The Vertex Based On Sine Waves
	IN.position.y = ( sin(IN.wave.x + (IN.position.x / 5.0) ) + sin(IN.wave.x + (IN.position.z / 4.0) ) ) * 2.5f;
	
	// Transform The Vertex Position Into Homogenous Clip-Space (Required)
	OUT.HPos = mul(ModelViewProj, IN.position);

	// Set The Color To The Value Specified In IN.color
	OUT.Col0.xyz = IN.color.xyz;

	return OUT;
}