Skip to content
Projects
Groups
Snippets
Help
Loading...
Help
Submit feedback
Sign in
Toggle navigation
F
Front-End
Project
Project
Details
Activity
Releases
Cycle Analytics
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Charts
Issues
0
Issues
0
List
Board
Labels
Milestones
Merge Requests
0
Merge Requests
0
CI / CD
CI / CD
Pipelines
Jobs
Schedules
Charts
Wiki
Wiki
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Charts
Create a new issue
Jobs
Commits
Issue Boards
Open sidebar
abdullh.alsoleman
Front-End
Commits
26234b10
Commit
26234b10
authored
Oct 12, 2015
by
Viktor Lidholt
Browse files
Options
Browse Files
Download
Plain Diff
Merge pull request #1580 from vlidholt/master
Working joints in sprite physics
parents
bb9cf6d7
4e787993
Changes
3
Hide whitespace changes
Inline
Side-by-side
Showing
3 changed files
with
50 additions
and
23 deletions
+50
-23
test_physics.dart
examples/game/test_physics.dart
+6
-2
physics_joint.dart
packages/flutter_sprites/lib/physics_joint.dart
+42
-19
physics_node.dart
packages/flutter_sprites/lib/physics_node.dart
+2
-2
No files found.
examples/game/test_physics.dart
View file @
26234b10
...
...
@@ -78,29 +78,33 @@ class TestBed extends NodeWithSize {
Sprite
shipA
;
shipA
=
new
Sprite
(
_spriteSheet
[
"ship.png"
]);
shipA
.
opacity
=
0.3
;
shipA
.
position
=
new
Point
(
pos
.
x
-
40.0
,
pos
.
y
);
shipA
.
size
=
new
Size
(
64.0
,
64.0
);
shipA
.
physicsBody
=
new
PhysicsBody
(
new
PhysicsShapeCircle
(
Point
.
origin
,
32.0
),
friction:
0.5
,
restitution:
0.5
,
tag:
"ship"
);
_physicsNode
.
addChild
(
shipA
);
shipA
.
physicsBody
.
applyLinearImpulse
(
new
Offset
(
randomSignedDouble
()
*
5
.0
,
randomSignedDouble
()
*
5
.0
),
new
Offset
(
randomSignedDouble
()
*
5
000.0
,
randomSignedDouble
()
*
5000
.0
),
shipA
.
position
);
Sprite
shipB
;
shipB
=
new
Sprite
(
_spriteSheet
[
"ship.png"
]);
shipB
.
opacity
=
0.3
;
shipB
.
position
=
new
Point
(
pos
.
x
+
40.0
,
pos
.
y
);
shipB
.
size
=
new
Size
(
64.0
,
64.0
);
shipB
.
physicsBody
=
new
PhysicsBody
(
new
PhysicsShapePolygon
([
new
Point
(-
25.0
,
-
25.0
),
new
Point
(
25.0
,
-
25.0
),
new
Point
(
25.0
,
25.0
),
new
Point
(-
25.0
,
25.0
)]),
friction:
0.5
,
restitution:
0.5
,
tag:
"ship"
);
_physicsNode
.
addChild
(
shipB
);
new
PhysicsJoint
Weld
(
shipA
.
physicsBody
,
shipB
.
physicsBody
);
new
PhysicsJoint
Revolute
(
shipA
.
physicsBody
,
shipB
.
physicsBody
,
pos
);
}
return
true
;
}
...
...
packages/flutter_sprites/lib/physics_joint.dart
View file @
26234b10
...
...
@@ -4,10 +4,6 @@ abstract class PhysicsJoint {
PhysicsJoint
(
this
.
bodyA
,
this
.
bodyB
)
{
bodyA
.
_joints
.
add
(
this
);
bodyB
.
_joints
.
add
(
this
);
if
(
bodyA
.
_attached
&&
bodyB
.
_attached
)
{
_attach
(
bodyA
.
_physicsNode
);
}
}
PhysicsBody
bodyA
;
...
...
@@ -18,6 +14,12 @@ abstract class PhysicsJoint {
PhysicsNode
_physicsNode
;
void
_completeCreation
()
{
if
(
bodyA
.
_attached
&&
bodyB
.
_attached
)
{
_attach
(
bodyA
.
_physicsNode
);
}
}
void
_attach
(
PhysicsNode
physicsNode
)
{
if
(
_joint
==
null
)
{
_physicsNode
=
physicsNode
;
...
...
@@ -40,7 +42,7 @@ class PhysicsJointRevolute extends PhysicsJoint {
PhysicsJointRevolute
(
PhysicsBody
bodyA
,
PhysicsBody
bodyB
,
this
.
anchorWorld
,
{
this
.
worldAnchor
,
{
double
lowerAngle:
0.0
,
double
upperAngle:
0.0
,
bool
enableLimit:
false
...
...
@@ -48,9 +50,11 @@ class PhysicsJointRevolute extends PhysicsJoint {
this
.
lowerAngle
=
lowerAngle
;
this
.
upperAngle
=
upperAngle
;
this
.
enableLimit
=
enableLimit
;
_completeCreation
();
}
Point
anchorWorld
;
Point
worldAnchor
;
double
lowerAngle
;
double
upperAngle
;
bool
enableLimit
;
...
...
@@ -58,8 +62,8 @@ class PhysicsJointRevolute extends PhysicsJoint {
box2d
.
Joint
_createB2Joint
(
PhysicsNode
physicsNode
)
{
// Create Joint Definition
Vector2
vecAnchor
=
new
Vector2
(
anchorWorld
.
x
/
physicsNode
.
b2WorldToNodeConversionFactor
,
anchorWorld
.
y
/
physicsNode
.
b2WorldToNodeConversionFactor
worldAnchor
.
x
/
physicsNode
.
b2WorldToNodeConversionFactor
,
worldAnchor
.
y
/
physicsNode
.
b2WorldToNodeConversionFactor
);
box2d
.
RevoluteJointDef
b2Def
=
new
box2d
.
RevoluteJointDef
();
...
...
@@ -73,18 +77,37 @@ class PhysicsJointRevolute extends PhysicsJoint {
}
}
class
PhysicsJointPrismatic
extends
PhysicsJoint
{
PhysicsJointPrismatic
(
PhysicsBody
bodyA
,
PhysicsBody
bodyB
,
this
.
axis
)
:
super
(
bodyA
,
bodyB
)
{
_completeCreation
();
}
Offset
axis
;
box2d
.
Joint
_createB2Joint
(
PhysicsNode
physicsNode
)
{
box2d
.
PrismaticJointDef
b2Def
=
new
box2d
.
PrismaticJointDef
();
b2Def
.
initialize
(
bodyA
.
_body
,
bodyB
.
_body
,
bodyA
.
_body
.
position
,
new
Vector2
(
axis
.
dx
,
axis
.
dy
));
return
physicsNode
.
b2World
.
createJoint
(
b2Def
);
}
}
class
PhysicsJointWeld
extends
PhysicsJoint
{
PhysicsJointWeld
(
PhysicsBody
bodyA
,
PhysicsBody
bodyB
)
:
super
(
bodyA
,
bodyB
);
box2d
.
Joint
_createB2Joint
(
PhysicsNode
physicsNode
)
{
box2d
.
WeldJointDef
b2Def
=
new
box2d
.
WeldJointDef
();
Vector2
middle
=
new
Vector2
(
(
bodyA
.
_body
.
position
.
x
+
bodyB
.
_body
.
position
.
x
)
/
2.0
,
(
bodyA
.
_body
.
position
.
y
+
bodyB
.
_body
.
position
.
y
)
/
2.0
);
b2Def
.
initialize
(
bodyA
.
_body
,
bodyB
.
_body
,
middle
);
return
physicsNode
.
b2World
.
createJoint
(
b2Def
);
}
PhysicsBody
bodyB
)
:
super
(
bodyA
,
bodyB
)
{
_completeCreation
();
}
box2d
.
Joint
_createB2Joint
(
PhysicsNode
physicsNode
)
{
box2d
.
WeldJointDef
b2Def
=
new
box2d
.
WeldJointDef
();
Vector2
middle
=
new
Vector2
(
(
bodyA
.
_body
.
position
.
x
+
bodyB
.
_body
.
position
.
x
)
/
2.0
,
(
bodyA
.
_body
.
position
.
y
+
bodyB
.
_body
.
position
.
y
)
/
2.0
);
b2Def
.
initialize
(
bodyA
.
_body
,
bodyB
.
_body
,
middle
);
return
physicsNode
.
b2World
.
createJoint
(
b2Def
);
}
}
packages/flutter_sprites/lib/physics_node.dart
View file @
26234b10
...
...
@@ -33,7 +33,7 @@ class PhysicsNode extends Node {
List
<
box2d
.
Body
>
_bodiesScheduledForDestruction
=
[];
double
b2WorldToNodeConversionFactor
=
50
0.0
;
double
b2WorldToNodeConversionFactor
=
1
0.0
;
Offset
get
gravity
{
Vector2
g
=
b2World
.
getGravity
();
...
...
@@ -282,7 +282,7 @@ class PhysicsNode extends Node {
// Draw the joint depending on type
box2d
.
JointType
type
=
joint
.
getType
();
if
(
type
==
box2d
.
JointType
.
WELD
)
{
if
(
type
==
box2d
.
JointType
.
WELD
||
type
==
box2d
.
JointType
.
REVOLUTE
)
{
// Draw weld joint
canvas
.
drawCircle
(
ptAnchorA
,
5.0
,
shapePaint
);
...
...
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment