lerp function
Performs a linear interpolation between two vec4's
@param {vec4} out the receiving vector
@param {ReadonlyVec4} a the first operand
@param {ReadonlyVec4} b the second operand
@param {Number} t interpolation amount, in the range 0-1
, between the two inputs
@returns {vec4} out
Implementation
List<double> lerp(List<double> out, List<double> a, List<double> b, double t) {
final ax = a[0];
final ay = a[1];
final az = a[2];
final aw = a[3];
out[0] = ax + t * (b[0] - ax);
out[1] = ay + t * (b[1] - ay);
out[2] = az + t * (b[2] - az);
out[3] = aw + t * (b[3] - aw);
return out;
}