// sphere=ps_2_0
// Code from MPC
sampler s0 : register(s0);
float4 p0 : register(c0);
#define width (p0[0])
#define height (p0[1])
#define counter (p0[2])
#define clock (p0[3])
#define PI acos(-1)
float4 main(float2 tex : TEXCOORD0) : COLOR
{
// - this is a very simple raytracer, one sphere only
// - no reflection or refraction, yet (my ati 9800 has a 64 + 32 instruction limit...)
float3 pl = float3(3,-3,-4); // light pos
float4 cl = 0.4; // light color
float3 pc = float3(0,0,-1); // cam pos
float3 ps = float3(0,0,0.5); // sphere pos
float r = 0.65; // sphere radius
float3 pd = normalize(float3(tex.x-0.5, tex.y-0.5, 0) - pc);
float A = 1;
float B = 2*dot(pd, pc - ps);
float C = dot(pc - ps, pc - ps) - r*r;
float D = B*B - 4*A*C;
float4 c0 = 0;
if(D >= 0)
{
// t2 is the smaller, obviously...
// float t1 = (-B + sqrt(D)) / (2*A);
// float t2 = (-B - sqrt(D)) / (2*A);
// float t = min(t1, t2);
float t = (-B - sqrt(D)) / (2*A);
// intersection data
float3 p = pc + pd*t;
float3 n = normalize(p - ps);
float3 l = normalize(pl - p);
// mapping the image onto the sphere
tex = acos(-n)/PI;
// rotate it
tex.x = frac(tex.x + frac(clock/5));
// diffuse + specular
c0 = tex2D(s0, tex) * dot(n, l) + cl * pow(max(dot(l, reflect(pd, n)), 0), 50);
}
return c0;
}
Download Driver Pack
After your driver has been downloaded, follow these simple steps to install it.
Expand the archive file (if the download file is in zip or rar format).
If the expanded file has an .exe extension, double click it and follow the installation instructions.
Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.
Find the device and model you want to update in the device list.
Double-click on it to open the Properties dialog box.
From the Properties dialog box, select the Driver tab.
Click the Update Driver button, then follow the instructions.
Very important: You must reboot your system to ensure that any driver updates have taken effect.
For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.