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use fmt;
use math;
export def V3_ZERO: v3 = [0.0, 0.0, 0.0];
export def V3_ONE: v3 = [1.0, 1.0, 1.0];
export fn v3_new(x: f32, y: f32, z: f32) v3 = {
return [x, y, z];
};
export fn v3_new_fill(x: f32) v3 = {
return [x, x, x];
};
export fn v3_new_zero() v3 = {
return [0.0, 0.0, 0.0];
};
export fn v3_copy(v: *v3) v3 = {
return [v[0], v[1], v[2]];
};
export fn v3_copy_to(v: *v3, dest: *v3) void = {
dest[0] = v[0];
dest[1] = v[1];
dest[2] = v[2];
};
export fn v3_valptr(v: *v3) *const f32 = {
return &v[0];
};
export fn v3_print(v: *v3) void = {
fmt::printfln("[ {}, {}, {} ]", v[0], v[1], v[2])!;
};
export fn v3_negate(v: *v3) void = {
v[0] *= -1.0;
v[1] *= -1.0;
v[2] *= -1.0;
};
export fn v3_negate_to(v: *v3, dest: *v3) void = {
dest[0] = v[0] * -1.0;
dest[1] = v[1] * -1.0;
dest[2] = v[2] * -1.0;
};
export fn v3_add(a: *v3, b: *v3) v3 = {
return [
a[0] + b[0],
a[1] + b[1],
a[2] + b[2],
];
};
export fn v3_sub(a: *v3, b: *v3) v3 = {
return [
a[0] - b[0],
a[1] - b[1],
a[2] - b[2],
];
};
export fn v3_normalize(v: *v3) void = {
const norm = v3_norm(v);
if (norm == 0.0) {
v[0] = 0.0;
v[1] = 0.0;
v[2] = 0.0;
return;
};
v3_scale(v, 1.0 / norm);
};
export fn v3_normalize_to(v: *v3, dest: *v3) void = {
const norm = v3_norm(v);
if (norm == 0.0) {
dest[0] = 0.0;
dest[1] = 0.0;
dest[2] = 0.0;
return;
};
v3_scale_to(v, 1.0 / norm, dest);
};
export fn v3_dot(a: *v3, b: *v3) f32 = {
return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
};
export fn v3_norm2(v: *v3) f32 = {
return v3_dot(v, v);
};
export fn v3_norm(v: *v3) f32 = {
return math::sqrtf64(v3_norm2(v)): f32;
};
export fn v3_scale(v: *v3, s: f32) void = {
v[0] = v[0] * s;
v[1] = v[1] * s;
v[2] = v[2] * s;
};
export fn v3_scale_to(v: *v3, s: f32, dest: *v3) void = {
dest[0] = v[0] * s;
dest[1] = v[1] * s;
dest[2] = v[2] * s;
};
export fn v3_cross(a: *v3, b: *v3) v3 = {
return [
a[1] * b[2] - a[2] * b[1],
a[2] * b[0] - a[0] * b[2],
a[0] * b[1] - a[1] * b[0],
];
};
export fn v3_crossn(a: *v3, b: *v3) v3 = {
let res = v3_cross(a, b);
v3_normalize(&res);
return res;
};
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