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Implemented buggy free hand canvas transform for touchscreens.

This commit is contained in:
Mono 2021-11-21 13:44:46 +01:00
parent 8d028205fb
commit a4b7de996b
1 changed files with 48 additions and 3 deletions
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51
addons/summer_day/tool/canvas/tools/general_use/free_transform.gd
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@ -2,15 +2,60 @@ extends SummerDayTool
class_name SummerDayFreeTransformCanvasTool
var touch_dict = {}
var initial_touches
var current_touches
var initial_transform: Transform2D
func _init():
priority = 1
func _check_for_use(event: InputEvent, tool_context: SummerDayToolContext):
if event is InputEventScreenTouch:
if event.pressed:
touch_dict[event.index] = event.position
else:
touch_dict.erase(event.index)
if touch_dict.size() == 2:
initial_transform = tool_context.canvas_state.canvas_transform
var keys = touch_dict.keys()
initial_touches = [touch_dict[keys[0]], touch_dict[keys[1]]]
print(touch_dict)
if event is InputEventScreenDrag:
return true
touch_dict[event.index] = event.position
if touch_dict.size() == 2:
var keys = touch_dict.keys()
current_touches = [touch_dict[keys[0]], touch_dict[keys[1]]]
return true
return false
func _run(event: InputEvent, tool_context: SummerDayToolContext):
var transform := tool_context.canvas_state.canvas_transform
transform = transform.translated(event.relative)
var jump := Transform2D.IDENTITY
# Calculate scale.
var initial_distance = initial_touches[0].distance_to(initial_touches[1])
var current_distance = current_touches[0].distance_to(current_touches[1])
var scale = current_distance / initial_distance
# Calculate rotation.
var initial_angle = initial_touches[0].angle_to_point(initial_touches[1])
var current_angle = current_touches[0].angle_to_point(current_touches[1])
var rotation = current_angle - initial_angle
jump = jump.scaled(Vector2(scale, scale)).rotated(rotation)
# Calculate origin.
var transformed_initial_touch = jump.basis_xform(initial_touches[0])
var offset = current_touches[0] - transformed_initial_touch
print(jump)
jump = Transform2D(Vector2.RIGHT, Vector2.DOWN, offset) * jump
print(jump)
var transform = jump * initial_transform
tool_context.canvas_state.canvas_transform = transform