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godot/tools/editor/plugins/collision_polygon_editor_plugin.cpp
Juan Linietsky 9ff6d55822 Polygon2D 
-=-=-=-=-

Another gift for those who make 2D games:
-Edit polygons, concave or convex, color them, texture them and uv-map them
-Corresponding editor
-Can have a custom pivot, so they are compatible with bones and IK
2014-07-07 17:44:21 -03:00

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/*************************************************************************/
/* collision_polygon_editor_plugin.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "collision_polygon_editor_plugin.h"
#include "canvas_item_editor_plugin.h"
#include "os/file_access.h"
#include "tools/editor/editor_settings.h"
void CollisionPolygonEditor::_notification(int p_what) {
switch(p_what) {
case NOTIFICATION_READY: {
button_create->set_icon( get_icon("Edit","EditorIcons"));
button_edit->set_icon( get_icon("MovePoint","EditorIcons"));
button_edit->set_pressed(true);
} break;
case NOTIFICATION_FIXED_PROCESS: {
} break;
}
}
void CollisionPolygonEditor::_node_removed(Node *p_node) {
if(p_node==node) {
node=NULL;
hide();
}
}
Vector2 CollisionPolygonEditor::snap_point(const Vector2& p_point) const {
if (canvas_item_editor->is_snap_active()) {
return p_point.snapped(Vector2(1,1)*canvas_item_editor->get_snap());
} else {
return p_point;
}
}
void CollisionPolygonEditor::_menu_option(int p_option) {
switch(p_option) {
case MODE_CREATE: {
mode=MODE_CREATE;
button_create->set_pressed(true);
button_edit->set_pressed(false);
} break;
case MODE_EDIT: {
mode=MODE_EDIT;
button_create->set_pressed(false);
button_edit->set_pressed(true);
} break;
}
}
void CollisionPolygonEditor::_wip_close() {
undo_redo->create_action("Create Poly");
undo_redo->add_undo_method(node,"set_polygon",node->get_polygon());
undo_redo->add_do_method(node,"set_polygon",wip);
undo_redo->add_do_method(canvas_item_editor->get_viewport_control(),"update");
undo_redo->add_undo_method(canvas_item_editor->get_viewport_control(),"update");
undo_redo->commit_action();
wip.clear();
wip_active=false;
mode=MODE_EDIT;
button_edit->set_pressed(true);
button_create->set_pressed(false);
edited_point=-1;
}
bool CollisionPolygonEditor::forward_input_event(const InputEvent& p_event) {
switch(p_event.type) {
case InputEvent::MOUSE_BUTTON: {
const InputEventMouseButton &mb=p_event.mouse_button;
Matrix32 xform = canvas_item_editor->get_canvas_transform() * node->get_global_transform();
Vector2 gpoint = Point2(mb.x,mb.y);
Vector2 cpoint = canvas_item_editor->get_canvas_transform().affine_inverse().xform(gpoint);
cpoint=snap_point(cpoint);
cpoint = node->get_global_transform().affine_inverse().xform(cpoint);
Vector<Vector2> poly = node->get_polygon();
//first check if a point is to be added (segment split)
real_t grab_treshold=EDITOR_DEF("poly_editor/point_grab_radius",8);
switch(mode) {
case MODE_CREATE: {
if (mb.button_index==BUTTON_LEFT && mb.pressed) {
if (!wip_active) {
wip.clear();
wip.push_back( cpoint );
wip_active=true;
edited_point_pos=cpoint;
canvas_item_editor->get_viewport_control()->update();
edited_point=1;
return true;
} else {
if (wip.size()>1 && xform.xform(wip[0]).distance_to(gpoint)<grab_treshold) {
//wip closed
_wip_close();
return true;
} else {
wip.push_back( cpoint );
edited_point=wip.size();
canvas_item_editor->get_viewport_control()->update();
return true;
//add wip point
}
}
} else if (mb.button_index==BUTTON_RIGHT && mb.pressed && wip_active) {
_wip_close();
}
} break;
case MODE_EDIT: {
if (mb.button_index==BUTTON_LEFT) {
if (mb.pressed) {
if (mb.mod.control) {
if (poly.size() < 3) {
undo_redo->create_action("Edit Poly");
undo_redo->add_undo_method(node,"set_polygon",poly);
poly.push_back(cpoint);
undo_redo->add_do_method(node,"set_polygon",poly);
undo_redo->add_do_method(canvas_item_editor->get_viewport_control(),"update");
undo_redo->add_undo_method(canvas_item_editor->get_viewport_control(),"update");
undo_redo->commit_action();
return true;
}
//search edges
int closest_idx=-1;
Vector2 closest_pos;
real_t closest_dist=1e10;
for(int i=0;i<poly.size();i++) {
Vector2 points[2] ={ xform.xform(poly[i]),
xform.xform(poly[(i+1)%poly.size()]) };
Vector2 cp = Geometry::get_closest_point_to_segment_2d(gpoint,points);
if (cp.distance_squared_to(points[0])<CMP_EPSILON2 || cp.distance_squared_to(points[1])<CMP_EPSILON2)
continue; //not valid to reuse point
real_t d = cp.distance_to(gpoint);
if (d<closest_dist && d<grab_treshold) {
closest_dist=d;
closest_pos=cp;
closest_idx=i;
}
}
if (closest_idx>=0) {
pre_move_edit=poly;
poly.insert(closest_idx+1,xform.affine_inverse().xform(closest_pos));
edited_point=closest_idx+1;
edited_point_pos=xform.affine_inverse().xform(closest_pos);
node->set_polygon(poly);
canvas_item_editor->get_viewport_control()->update();
return true;
}
} else {
//look for points to move
int closest_idx=-1;
Vector2 closest_pos;
real_t closest_dist=1e10;
for(int i=0;i<poly.size();i++) {
Vector2 cp =xform.xform(poly[i]);
real_t d = cp.distance_to(gpoint);
if (d<closest_dist && d<grab_treshold) {
closest_dist=d;
closest_pos=cp;
closest_idx=i;
}
}
if (closest_idx>=0) {
pre_move_edit=poly;
edited_point=closest_idx;
edited_point_pos=xform.affine_inverse().xform(closest_pos);
canvas_item_editor->get_viewport_control()->update();
return true;
}
}
} else {
if (edited_point!=-1) {
//apply
ERR_FAIL_INDEX_V(edited_point,poly.size(),false);
poly[edited_point]=edited_point_pos;
undo_redo->create_action("Edit Poly");
undo_redo->add_do_method(node,"set_polygon",poly);
undo_redo->add_undo_method(node,"set_polygon",pre_move_edit);
undo_redo->add_do_method(canvas_item_editor->get_viewport_control(),"update");
undo_redo->add_undo_method(canvas_item_editor->get_viewport_control(),"update");
undo_redo->commit_action();
edited_point=-1;
return true;
}
}
} if (mb.button_index==BUTTON_RIGHT && mb.pressed && edited_point==-1) {
int closest_idx=-1;
Vector2 closest_pos;
real_t closest_dist=1e10;
for(int i=0;i<poly.size();i++) {
Vector2 cp =xform.xform(poly[i]);
real_t d = cp.distance_to(gpoint);
if (d<closest_dist && d<grab_treshold) {
closest_dist=d;
closest_pos=cp;
closest_idx=i;
}
}
if (closest_idx>=0) {
undo_redo->create_action("Edit Poly (Remove Point)");
undo_redo->add_undo_method(node,"set_polygon",poly);
poly.remove(closest_idx);
undo_redo->add_do_method(node,"set_polygon",poly);
undo_redo->add_do_method(canvas_item_editor->get_viewport_control(),"update");
undo_redo->add_undo_method(canvas_item_editor->get_viewport_control(),"update");
undo_redo->commit_action();
return true;
}
}
} break;
}
} break;
case InputEvent::MOUSE_MOTION: {
const InputEventMouseMotion &mm=p_event.mouse_motion;
if (edited_point!=-1 && (wip_active || mm.button_mask&BUTTON_MASK_LEFT)) {
Vector2 gpoint = Point2(mm.x,mm.y);
Vector2 cpoint = canvas_item_editor->get_canvas_transform().affine_inverse().xform(gpoint);
cpoint=snap_point(cpoint);
edited_point_pos = node->get_global_transform().affine_inverse().xform(cpoint);
canvas_item_editor->get_viewport_control()->update();
}
} break;
}
return false;
}
void CollisionPolygonEditor::_canvas_draw() {
if (!node)
return;
Control *vpc = canvas_item_editor->get_viewport_control();
Vector<Vector2> poly;
if (wip_active)
poly=wip;
else
poly=node->get_polygon();
Matrix32 xform = canvas_item_editor->get_canvas_transform() * node->get_global_transform();
Ref<Texture> handle= get_icon("EditorHandle","EditorIcons");
int len = poly.size();
for(int i=0;i<poly.size();i++) {
Vector2 p,p2;
p = i==edited_point ? edited_point_pos : poly[i];
if ((wip_active && i==poly.size()-1) || (((i+1)%poly.size())==edited_point))
p2=edited_point_pos;
else
p2 = poly[(i+1)%poly.size()];
Vector2 point = xform.xform(p);
Vector2 next_point = xform.xform(p2);
Color col=Color(1,0.3,0.1,0.8);
vpc->draw_line(point,next_point,col,2);
vpc->draw_texture(handle,point-handle->get_size()*0.5);
}
}
void CollisionPolygonEditor::edit(Node *p_collision_polygon) {
if (!canvas_item_editor) {
canvas_item_editor=CanvasItemEditor::get_singleton();
}
if (p_collision_polygon) {
node=p_collision_polygon->cast_to<CollisionPolygon2D>();
if (!canvas_item_editor->get_viewport_control()->is_connected("draw",this,"_canvas_draw"))
canvas_item_editor->get_viewport_control()->connect("draw",this,"_canvas_draw");
wip.clear();
wip_active=false;
edited_point=-1;
} else {
node=NULL;
if (canvas_item_editor->get_viewport_control()->is_connected("draw",this,"_canvas_draw"))
canvas_item_editor->get_viewport_control()->disconnect("draw",this,"_canvas_draw");
}
}
void CollisionPolygonEditor::_bind_methods() {
ObjectTypeDB::bind_method(_MD("_menu_option"),&CollisionPolygonEditor::_menu_option);
ObjectTypeDB::bind_method(_MD("_canvas_draw"),&CollisionPolygonEditor::_canvas_draw);
}
CollisionPolygonEditor::CollisionPolygonEditor(EditorNode *p_editor) {
canvas_item_editor=NULL;
editor=p_editor;
undo_redo = editor->get_undo_redo();
add_child( memnew( VSeparator ));
button_create = memnew( ToolButton );
add_child(button_create);
button_create->connect("pressed",this,"_menu_option",varray(MODE_CREATE));
button_create->set_toggle_mode(true);
button_edit = memnew( ToolButton );
add_child(button_edit);
button_edit->connect("pressed",this,"_menu_option",varray(MODE_EDIT));
button_edit->set_toggle_mode(true);
//add_constant_override("separation",0);
#if 0
options = memnew( MenuButton );
add_child(options);
options->set_area_as_parent_rect();
options->set_text("Polygon");
//options->get_popup()->add_item("Parse BBCODE",PARSE_BBCODE);
options->get_popup()->connect("item_pressed", this,"_menu_option");
#endif
mode = MODE_EDIT;
wip_active=false;
}
void CollisionPolygonEditorPlugin::edit(Object *p_object) {
collision_polygon_editor->edit(p_object->cast_to<Node>());
}
bool CollisionPolygonEditorPlugin::handles(Object *p_object) const {
return p_object->is_type("CollisionPolygon2D");
}
void CollisionPolygonEditorPlugin::make_visible(bool p_visible) {
if (p_visible) {
collision_polygon_editor->show();
} else {
collision_polygon_editor->hide();
collision_polygon_editor->edit(NULL);
}
}
CollisionPolygonEditorPlugin::CollisionPolygonEditorPlugin(EditorNode *p_node) {
editor=p_node;
collision_polygon_editor = memnew( CollisionPolygonEditor(p_node) );
CanvasItemEditor::get_singleton()->add_control_to_menu_panel(collision_polygon_editor);
collision_polygon_editor->hide();
}
CollisionPolygonEditorPlugin::~CollisionPolygonEditorPlugin()
{
}
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