Sketch 1 / Create Points Attribute Wrangle

create_points.c

// paramaters come in as floats by default
// in order to cast them to other types
// need to wrap them in a "set()"

int width = set(ch("width"));
int height = set(ch("height"));
int num_points = set(ch("num_points"));
int seed = set(ch("seed"));

// seed needs to be persisted
// down the line as an attributes 
// to remain available to future geometry
i@seed = seed;


for (int i = 0; i < num_points; i++)
{
    // if we just used "rand(i)"
    // without offsetting the random seeds differently
    // we end up with a diagonal line of points
    float random_remap_x = fit(rand(seed+i), 0, 1, -0.5, 0.5);
    float random_remap_y = fit(rand(seed-i), 0, 1, -0.5, 0.5);

    float xpos = random_remap_x * width;
    float zpos = random_remap_y * height;
    vector position = set(xpos, 0, zpos);

    // http://www.sidefx.com/docs/houdini/vex/functions/addpoint.html
    addpoint(0, position);
}