- else if(sstyle == 1)
- {
- // same thing, basically
- return normalize(forward + cliptoplane(randomvec() * spread, forward));
- }
- else if(sstyle == 2)
- {
- // circle spread... has at sigma=1 a standard deviation of sqrt(1/2)
- sigma = spread * 0.89442719099991587855; // match baseline stddev
- v1 = findperpendicular(forward);
- v2 = cross(forward, v1);
- // random point on unit circle
- dx = random() * 2 * M_PI;
- dy = sin(dx);
- dx = cos(dx);
- // radius in our dist function
- r = random();
- r = sqrt(r);
- return normalize(forward + (v1 * dx + v2 * dy) * r * sigma);
- }
- else if(sstyle == 3) // gauss 3d
- {
- sigma = spread * 0.44721359549996; // match baseline stddev
- // note: 2D gaussian has sqrt(2) times the stddev of 1D, so this factor is right
- v1 = forward;
- v1_x += gsl_ran_gaussian(sigma);
- v1_y += gsl_ran_gaussian(sigma);
- v1_z += gsl_ran_gaussian(sigma);
- return v1;
- }
- else if(sstyle == 4) // gauss 2d
- {
- sigma = spread * 0.44721359549996; // match baseline stddev
- // note: 2D gaussian has sqrt(2) times the stddev of 1D, so this factor is right
- v1_x = gsl_ran_gaussian(sigma);
- v1_y = gsl_ran_gaussian(sigma);
- v1_z = gsl_ran_gaussian(sigma);
- return normalize(forward + cliptoplane(v1, forward));
- }
- else if(sstyle == 5) // 1-r
- {
- sigma = spread * 1.154700538379252; // match baseline stddev
- v1 = findperpendicular(forward);
- v2 = cross(forward, v1);
- // random point on unit circle
- dx = random() * 2 * M_PI;
- dy = sin(dx);
- dx = cos(dx);
- // radius in our dist function
- r = random();
- r = solve_cubic_abcd(-2, 3, 0, -r) * '0 1 0';
- return normalize(forward + (v1 * dx + v2 * dy) * r * sigma);
- }
- else if(sstyle == 6) // 1-r^2
- {
- sigma = spread * 1.095445115010332; // match baseline stddev
- v1 = findperpendicular(forward);
- v2 = cross(forward, v1);
- // random point on unit circle
- dx = random() * 2 * M_PI;
- dy = sin(dx);
- dx = cos(dx);
- // radius in our dist function
- r = random();
- r = sqrt(1 - r);
- r = sqrt(1 - r);
- return normalize(forward + (v1 * dx + v2 * dy) * r * sigma);
- }
- else if(sstyle == 7) // (1-r) (2-r)
- {
- sigma = spread * 1.224744871391589; // match baseline stddev
- v1 = findperpendicular(forward);
- v2 = cross(forward, v1);
- // random point on unit circle
- dx = random() * 2 * M_PI;
- dy = sin(dx);
- dx = cos(dx);
- // radius in our dist function
- r = random();
- r = 1 - sqrt(r);
- r = 1 - sqrt(r);
- return normalize(forward + (v1 * dx + v2 * dy) * r * sigma);
- }
- else
- error("g_projectiles_spread_style must be 0 (sphere), 1 (flattened sphere), 2 (circle), 3 (gauss 3D), 4 (gauss plane), 5 (linear falloff), 6 (quadratic falloff), 7 (stronger falloff)!");