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This commit is contained in:
Jon Ziebell 2026-02-21 19:56:17 -05:00
parent ff4f90575b
commit 3d38578b39
1 changed files with 30 additions and 3 deletions
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33
js/component/scene/tree.js
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@ -639,6 +639,8 @@ beestat.component.scene.prototype.create_round_tree_ = function(height, max_diam
const initial_branch_direction = new THREE.Vector3(1, 0, -0.2).normalize();
const branch_rotation_axis = new THREE.Vector3(0, 0, 1);
const min_sub_branch_fork_angle_radians = THREE.MathUtils.degToRad(15);
const max_sub_branch_fork_angle_radians = THREE.MathUtils.degToRad(30);
const get_next_branch_direction = function(previous_direction) {
const direction = previous_direction.clone().multiplyScalar(-1);
const angle_offset = (Math.PI / 18) + (Math.random() * ((Math.PI / 4) - (Math.PI / 18)));
@ -652,6 +654,29 @@ beestat.component.scene.prototype.create_round_tree_ = function(height, max_diam
direction.z = -Math.max(0.34, Math.abs(direction.z));
return direction.normalize();
};
const get_forked_child_direction = function(parent_direction, child_index, child_count) {
const parent = parent_direction.clone().normalize();
const world_up = new THREE.Vector3(0, 0, 1);
let fork_axis = new THREE.Vector3().crossVectors(parent, world_up);
if (fork_axis.lengthSq() < 1e-6) {
fork_axis = new THREE.Vector3().crossVectors(parent, new THREE.Vector3(1, 0, 0));
}
fork_axis.normalize();
const side = child_count <= 1 ? 1 : (child_index % 2 === 0 ? -1 : 1);
const fork_angle =
min_sub_branch_fork_angle_radians +
(Math.random() * (max_sub_branch_fork_angle_radians - min_sub_branch_fork_angle_radians));
const forked = parent.clone().applyQuaternion(
new THREE.Quaternion().setFromAxisAngle(fork_axis, side * fork_angle)
);
// Add a small roll around the parent axis so forks don't look planar.
const roll_angle = (Math.random() - 0.5) * THREE.MathUtils.degToRad(8);
forked.applyQuaternion(
new THREE.Quaternion().setFromAxisAngle(parent, roll_angle)
);
return forked.normalize();
};
for (let i = 0; i < branch_count; i++) {
const stratified = branch_count <= 1 ? 0.5 : (i / (branch_count - 1));
const jittered = stratified + ((Math.random() - 0.5) * 0.25 / branch_count);
@ -726,7 +751,6 @@ beestat.component.scene.prototype.create_round_tree_ = function(height, max_diam
return;
}
let previous_child_direction = parent_branch.direction;
for (let j = 0; j < children_per_branch; j++) {
const attach_ratio = children_per_branch <= 1
? 0.6
@ -734,7 +758,11 @@ beestat.component.scene.prototype.create_round_tree_ = function(height, max_diam
const attach_point = get_stick_point_world(parent_branch, attach_ratio);
const child_length = parent_branch.length * 0.62;
const child_radius_bottom = Math.max(0.15, parent_branch.radius_bottom * 0.62);
const child_direction = get_next_branch_direction(previous_child_direction);
const child_direction = get_forked_child_direction(
parent_branch.direction,
j,
children_per_branch
);
const child_branch = create_branch(
attach_point,
child_direction,
@ -744,7 +772,6 @@ beestat.component.scene.prototype.create_round_tree_ = function(height, max_diam
if (child_branch === null) {
continue;
}
previous_child_direction = child_direction;
add_sub_branches(child_branch, depth + 1);
}
};