GMod GPU speedometer

#define MAX_SPEED 180

dclrscr blue;
dsetwidth 2
dsetsize 20
timer 50
Main();
dexit;

float SpeedToAngle(float speed)
{
    float pi;
    fpi pi;

    mov ecx, speed;
    div ecx, 180;
    mul ecx, pi;

    return ecx;
}

void DrawKM()
{
    float pos[2];
    float m, k, i, count;

    count = 0;

    for(m = count = 0; m <= 180 ; m += (MAX_SPEED / 18))
    {
        float j = SpeedToAngle(m);
        mov ecx, j
        fcos eax, ecx;
        fsin edx, ecx;

        k = eax;
        i = edx;

        k *= 220;
        i *= 220;

        pos[0] = 250 - k;
        pos[1] = 300 - i;

        dcolor black
        dline center, pos
        dcolor red
        dwritei pos, m

        count += 10;
    }
}

float GetVelocity()
{
    float vel;
    mov eax, port1
    div eax, 6.2
    mov vel, eax

    return vel
}

void DrawArrow(float speed)
{
    if(speed > MAX_SPEED)
        speed = MAX_SPEED;

    if(speed < 0)
        speed = 0;

    float k, i;
    float pos[2];

    float j = SpeedToAngle(speed);
    mov ecx, j
    fcos eax, ecx
    fsin edx, ecx

    k = eax
    i = edx

    k *= 220
    i *= 220

    pos[0] = 250 - k;
    pos[1] = 300 - i;

    dcolor green
    dline center, pos
}

void Main()
{
    DrawKM();
    DrawArrow(GetVelocity());
}


color black, 0, 0, 0
color red, 255, 0, 0
color blue, 0, 0,255
color green, 0, 255, 0
vec2f size, 256, 256
vec2f center, 256, 300