35 lines
1.0 KiB
GLSL
35 lines
1.0 KiB
GLSL
|
vec3 rotateVector(vec4 quat, vec3 vec)
|
||
|
|
{
|
||
|
|
return vec + 2.0 * cross(cross(vec, quat.xyz) + quat.w * vec, quat.xyz);
|
||
|
|
}
|
||
|
|
|
||
|
|
vec4 getWorldPosition(vec3 origin, vec4 rotation, vec3 scale, vec3 local_pos)
|
||
|
|
{
|
||
|
|
local_pos = local_pos * scale;
|
||
|
|
local_pos = rotateVector(rotation, local_pos);
|
||
|
|
local_pos = local_pos + origin;
|
||
|
|
return vec4(local_pos, 1.0);
|
||
|
|
}
|
||
|
|
|
||
|
|
vec4 convert10BitVector(int pked)
|
||
|
|
{
|
||
|
|
vec4 ret;
|
||
|
|
int part = pked & 1023;
|
||
|
|
float part_mix = float(clamp(int(part & 512), 0, 1));
|
||
|
|
ret.x = mix(float(part), float(-1024 + part), part_mix) * 0.00195694715;
|
||
|
|
|
||
|
|
part = (pked >> 10) & 1023;
|
||
|
|
part_mix = float(clamp(int(part & 512), 0, 1));
|
||
|
|
ret.y = mix(float(part), float(-1024 + part), part_mix) * 0.00195694715;
|
||
|
|
|
||
|
|
part = (pked >> 20) & 1023;
|
||
|
|
part_mix = float(clamp(int(part & 512), 0, 1));
|
||
|
|
ret.z = mix(float(part), float(-1024 + part), part_mix) * 0.00195694715;
|
||
|
|
|
||
|
|
part = pked >> 30;
|
||
|
|
part_mix = float(clamp(int(part & 2), 0, 1));
|
||
|
|
ret.w = mix(float(part), -1.0f, part_mix);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|