0edaebe192
Branching is not recommended in shaders and only recently gained widespread support without causing massive branch misprediction issues. Also sampling inside a branch will cause cache misses and additional texture load instructions.
47 lines
969 B
Plaintext
47 lines
969 B
Plaintext
uniform float4x4 ViewProj;
|
|
uniform texture2d tex_a;
|
|
uniform texture2d tex_b;
|
|
uniform float2 tex_a_dir;
|
|
uniform float2 tex_b_dir;
|
|
|
|
|
|
sampler_state textureSampler {
|
|
Filter = Linear;
|
|
AddressU = Clamp;
|
|
AddressV = Clamp;
|
|
};
|
|
|
|
struct VertData {
|
|
float4 pos : POSITION;
|
|
float2 uv : TEXCOORD0;
|
|
};
|
|
|
|
VertData VSDefault(VertData v_in)
|
|
{
|
|
VertData vert_out;
|
|
vert_out.pos = mul(float4(v_in.pos.xyz, 1.0), ViewProj);
|
|
vert_out.uv = v_in.uv;
|
|
return vert_out;
|
|
}
|
|
|
|
float4 PSSlide(VertData v_in) : TARGET
|
|
{
|
|
float2 tex_a_uv = v_in.uv + tex_a_dir;
|
|
float2 tex_b_uv = v_in.uv - tex_b_dir;
|
|
|
|
float4 tex_a_sample = tex_a.Sample(textureSampler, tex_a_uv);
|
|
float4 tex_b_sample = tex_b.Sample(textureSampler, tex_b_uv);
|
|
|
|
float val = saturate(abs((tex_a_uv.x - saturate(tex_a_uv.x)) + (tex_a_uv.y - saturate(tex_a_uv.y))) * 65535);
|
|
return lerp(tex_a_sample, tex_b_sample, val);
|
|
}
|
|
|
|
technique Slide
|
|
{
|
|
pass
|
|
{
|
|
vertex_shader = VSDefault(v_in);
|
|
pixel_shader = PSSlide(v_in);
|
|
}
|
|
}
|