Jeu Videz votre presse-papier - Page 577

CParticleEvolver_Script	$LOCAL$/CParticleEvolver_Script_B000B1E5
{
	Expression = $LOCAL$/CCompilerSyntaxNodeExpression_FFFB00B5;
}
CCompilerSyntaxNodeExpression	$LOCAL$/CCompilerSyntaxNodeExpression_FFFB00B5
{
	EditorInfosPosition = int2(-549, 430);
	Expression = "function void Eval()
{
	float2	uv = Position.xz * 0.25;	// -1,1
	float3	viewVec = normalize(uv.xy1);
	float3	viewOrigin = float3(0,0,0);

	float3	sphereCenter(0,0,5);
	float	sphereRadius(3.0);
	
	float3	offset = sphereCenter - viewOrigin;
	float	dist = dot(viewVec, offset);
	float	c0 = step(dist, 0.0f);
	//if (dist > 0)
	{
		float	off2 = dot(offset, offset);
		float	r2 = sphereRadius * sphereRadius;
		float	c1 = step(off2, r2);
		//if (off2 > r2)
		{
			float	t = r2 - (off2 - dist * dist);
			float	c2 = step(t, 0.0f);
			//if (t >= 0.0f)
			{
				float	intersects = c0 * c1 * c2;
				t = dist - sqrt(t * c2);
				float3	normal = normalize(viewVec * t - offset);
				float3	lighting = float3(0.1,0.11,0.15) + min(1, max(0, dot(normal, normalize(float3(-1,-1,-0.5)))));
				float3	background = float3(0.15,0.08,0.05);

				Color = (background + (lighting - background) * intersects).xyz1;
			}
		}
	}

//	Color = float4(1);

}";
}