[feature] spline animation
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f02f8fc2f0
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1 changed files with 59 additions and 46 deletions
105
butils.py
105
butils.py
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@ -221,26 +221,26 @@ def get_hook_modifiers(blender_object: bpy.types.Object):
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return [m for m in blender_object.modifiers if m.type == "HOOK"]
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class BezierSplinePoint:
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class HookBezierSplinePoint:
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def __init__(
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self,
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co: mathutils.Vector,
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handle_left: mathutils.Vector,
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co: mathutils.Vector,
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handle_right: mathutils.Vector,
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):
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self.co: mathutils.Vector = co
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self.handle_left: mathutils.Vector = handle_left
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self.handle_right: mathutils.Vector = handle_right
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self.handle_left: mathutils.Vector = mathutils.Vector(handle_left)
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self.co: mathutils.Vector = mathutils.Vector(co)
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self.handle_right: mathutils.Vector = mathutils.Vector(handle_right)
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class BezierSpline:
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class HookBezierSpline:
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def __init__(
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self,
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n: int,
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use_cyclic_u: bool,
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resolution_u: int,
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):
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self.bezier_points = [BezierSplinePoint] * n
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self.bezier_points = [HookBezierSplinePoint] * n
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self.use_cyclic_u: int = use_cyclic_u
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self.resolution_u: int = resolution_u
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self.beziers: []
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@ -249,34 +249,31 @@ class BezierSpline:
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def calc_length(self, resolution) -> float:
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# ignore resolution when accessing length to imitate blender function
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print(f"{self.total_length=}")
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return self.total_length
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class BezierData:
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class HookBezierData:
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def __init__(self, n):
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self.splines = [BezierSpline] * n
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self.splines = [HookBezierSpline] * n
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class BezierCurve:
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class HookBezierCurve:
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def __init__(self, blender_curve: bpy.types.Object, resolution_factor=1.0):
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self.data = BezierData(len(blender_curve.data.splines))
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self.data = HookBezierData(len(blender_curve.data.splines))
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i = 0
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hooks = get_hook_modifiers(blender_curve)
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print(f"{blender_curve.name=} =============================================")
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for si, blender_spline in enumerate(blender_curve.data.splines):
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self.data.splines[si] = BezierSpline(
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self.data.splines[si] = HookBezierSpline(
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len(blender_spline.bezier_points),
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blender_spline.use_cyclic_u,
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blender_spline.resolution_u,
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)
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for pi, blender_bezier_point in enumerate(blender_spline.bezier_points):
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self.data.splines[si].bezier_points[pi] = BezierSplinePoint(
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blender_bezier_point.co,
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self.data.splines[si].bezier_points[pi] = HookBezierSplinePoint(
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blender_bezier_point.handle_left,
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blender_bezier_point.co,
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blender_bezier_point.handle_right,
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)
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print(pi)
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for hook in hooks:
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hook_co = False
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hook_handle_left = False
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@ -293,40 +290,57 @@ class BezierCurve:
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blender_curve.matrix_world.inverted()
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@ hook.object.matrix_world.translation
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)
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print(f"co {location=}")
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self.data.splines[si].bezier_points[pi].co = (
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self.data.splines[si]
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.bezier_points[pi]
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.co.lerp(location, hook.strength)
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)
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# if hook_handle_left:
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# location = (
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# hook.object.matrix_world.translation
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# - blender_curve.matrix_world.translation
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# ) + mathutils.Vector((-1, 0, 0))
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# print(f"handle_left {location=}")
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# self.data.splines[si].bezier_points[pi].handle_left = (
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# self.data.splines[si]
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# .bezier_points[pi]
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# .handle_left.lerp(location, hook.strength)
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# )
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# if hook_handle_right:
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# location = (
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# hook.object.matrix_world.translation
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# - blender_curve.matrix_world.translation
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# )
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# self.data.splines[si].bezier_points[pi].handle_right = (
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# self.data.splines[si]
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# .bezier_points[pi]
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# .handle_right.lerp(location, hook.strength)
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# )
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if hook_handle_left:
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location_left = location + (
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self.data.splines[si].bezier_points[pi].co
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- self.data.splines[si].bezier_points[pi].handle_left
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)
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self.data.splines[si].bezier_points[pi].handle_left = (
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self.data.splines[si]
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.bezier_points[pi]
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.co.lerp(location_left, hook.strength)
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)
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if hook_handle_right:
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location_right = location + (
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self.data.splines[si].bezier_points[pi].co
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- self.data.splines[si].bezier_points[pi].handle_right
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)
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self.data.splines[si].bezier_points[pi].handle_right = (
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self.data.splines[si]
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.bezier_points[pi]
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.co.lerp(location, hook.strength)
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)
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elif hook_handle_left:
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location = (
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blender_curve.matrix_world.inverted()
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@ hook.object.matrix_world.translation
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)
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self.data.splines[si].bezier_points[pi].handle_left = (
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self.data.splines[si]
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.bezier_points[pi]
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.handle_left.lerp(location, hook.strength)
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)
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elif hook_handle_right:
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location = (
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blender_curve.matrix_world.inverted()
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@ hook.object.matrix_world.translation
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)
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self.data.splines[si].bezier_points[pi].handle_right = (
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self.data.splines[si]
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.bezier_points[pi]
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.handle_right.lerp(location, hook.strength)
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)
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i += 1
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(
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self.data.splines[si].beziers,
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self.data.splines[si].lengths,
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self.data.splines[si].total_length,
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) = get_real_beziers_and_lengths(self.data.splines[si], resolution_factor)
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print(f"total length {self.data.splines[si].total_length}")
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def get_real_beziers_and_lengths(bezier_spline_obj, resolution_factor):
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@ -391,7 +405,7 @@ def calc_point_on_bezier_spline(
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if p.handle_left == p.co and len(bezier_spline_obj.bezier_points) > 1:
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beziers, lengths, total_length = (
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get_real_beziers_and_lengths(bezier_spline_obj, resolution_factor)
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if not isinstance(bezier_spline_obj, BezierSpline)
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if not isinstance(bezier_spline_obj, HookBezierSpline)
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else (
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bezier_spline_obj.beziers,
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bezier_spline_obj.lengths,
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@ -411,7 +425,7 @@ def calc_point_on_bezier_spline(
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beziers, lengths, total_length = (
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get_real_beziers_and_lengths(bezier_spline_obj, resolution_factor)
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if not isinstance(bezier_spline_obj, BezierSpline)
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if not isinstance(bezier_spline_obj, HookBezierSpline)
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else (
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bezier_spline_obj.beziers,
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bezier_spline_obj.lengths,
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@ -460,16 +474,15 @@ def calc_point_on_bezier_curve(
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output_spline_index=False,
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resolution_factor=1.0,
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):
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# bezier_curve = BezierCurve(bezier_curve_obj)
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# curve = bezier_curve.data
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curve = bezier_curve_obj.data
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bezier_curve = HookBezierCurve(bezier_curve_obj)
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curve = bezier_curve.data
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# curve = bezier_curve_obj.data
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# Loop through all splines in the curve
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total_length = 0
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for i, spline in enumerate(curve.splines):
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resolution = int(spline.resolution_u * resolution_factor)
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length = spline.calc_length(resolution=resolution)
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print(f"{utils.LINE()} {length=}")
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if total_length + length > distance or i == len(curve.splines) - 1:
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if output_spline_index and output_tangent:
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# return value from c_p_o_b_s is a tuple
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