Joints

interface_joints.odin

@@ -0,0 +1,162 @@
+package ion
+
+import "core:fmt"
+import b2 "vendor:box2d"
+import im "shared:odin-imgui"
+
+/*
+  TODO:
+    Delete joints
+    Angles in degree
+*/
+
+/*
+  All joints have bodyIdA and bodyIdB
+*/
+interface_edit_joint_common :: proc(joint_def : ^joint_common, interface: ^interface_state) -> bool
+{
+  level                    := interface.world
+  {
+    if joint_def.entity_a in  level.static_indexes{
+      entity_a := interface.entity_defs[level.static_indexes[joint_def.entity_a]] 
+      points_add(&interface.state.draw.points, entity_a.body_def.position, 20.0, b2.HexColor.Plum)
+    }
+    if joint_def.entity_b in  level.static_indexes{
+      entity_b := interface.entity_defs[level.static_indexes[joint_def.entity_b]] 
+      points_add(&interface.state.draw.points, entity_b.body_def.position, 20.0, b2.HexColor.Plum)
+    }
+  }
+
+  /*
+    Set body A and Body B on the basis of static index so that it can pesist after restart
+  */
+
+  if im.BeginCombo("Index A", fmt.ctprint(joint_def.entity_a))
+  {
+    for i in level.static_indexes
+    {
+      if im.Selectable(fmt.ctprint(i), i == joint_def.entity_a) do joint_def.entity_a = i
+    }
+    im.EndCombo()
+  }
+  
+  im.Separator()
+  
+  if im.BeginCombo("Index B", fmt.ctprint(joint_def.entity_b))
+  {
+    for i in level.static_indexes
+    {
+      if im.Selectable(fmt.ctprint(i), i == joint_def.entity_b) do joint_def.entity_b = i
+    }
+    im.EndCombo()
+  }
+  return false
+}
+
+
+interface_edit_distance_joint :: proc( interface : ^interface_state ) -> bool
+{
+  level                    := interface.world
+  interface.curr_joint_type = .distanceJoint
+
+  if len(level.distant_joint_defs) == 0 do im.Text("No distance joint created, Click add to create new")
+
+  if im.Button("Create new joint")
+  {
+    append(&level.distant_joint_defs, distance_joint_def{def = b2.DefaultDistanceJointDef()})
+
+    interface.curr_joint_index = i32(len(level.distant_joint_defs))
+  }
+
+  //Select index
+  {
+    if im.BeginCombo("Select joint", fmt.ctprint(interface.curr_joint_index))
+    {
+      for i in 0..<len(level.distant_joint_defs){
+        if im.Selectable(fmt.ctprint(i), i32(i) == interface.curr_joint_index) do interface.curr_joint_index = i32(i)
+      }
+      im.EndCombo()
+    }
+  }
+
+  if interface.curr_joint_index >= i32(len(level.distant_joint_defs)) do return false
+
+  joint_def := &level.distant_joint_defs[interface.curr_joint_index]
+  old_def   := joint_def^
+
+  if interface_edit_joint_common(cast(^joint_common)joint_def, interface) do return true
+
+  /*
+    Highlight the bodies here 
+  */
+
+  im.SliderFloat2("localAnchorA",  &joint_def.localAnchorA, -5, 5)
+  im.SliderFloat2("localAnchorB",  &joint_def.localAnchorB, -5, 5)
+  im.SliderFloat("Rest length",    &joint_def.length, 0, 100)
+  im.Checkbox("Enable Spring",     &joint_def.enableSpring)
+  im.InputFloat("Hertz ",          &joint_def.hertz)
+  im.InputFloat("Damping Ratio",   &joint_def.dampingRatio)
+  im.Checkbox("Enable Limit",      &joint_def.enableLimit)
+  im.InputFloat("Min length",      &joint_def.minLength)
+  im.InputFloat("Max length",      &joint_def.maxLength)
+  im.Checkbox("Enable Motor",      &joint_def.enableMotor)
+  im.InputFloat("Moror Torque",    &joint_def.maxMotorForce)
+  im.InputFloat("Moror Speed",     &joint_def.motorSpeed)
+  im.Checkbox("Collide Connected", &joint_def.collideConnected)
+  
+  return old_def != joint_def^
+}
+
+
+interface_edit_revolute_joint :: proc( interface : ^interface_state ) -> bool
+{
+  level                    := interface.world
+  interface.curr_joint_type = .revoluteJoint
+
+  if len(level.revolute_joint_defs) == 0 do im.Text("No revolute joint created, Click add to create new")
+
+  if im.Button("Create new joint")
+  {
+    append(&level.revolute_joint_defs, revolt_joint_def{def = b2.DefaultRevoluteJointDef()})
+
+    interface.curr_joint_index = i32(len(level.revolute_joint_defs))
+  }
+
+  //Select index
+  if im.BeginCombo("Select joint", fmt.ctprint(interface.curr_joint_index))
+  {
+    for i in 0..<len(level.revolute_joint_defs){
+      if im.Selectable(fmt.ctprint(i), i32(i) == interface.curr_joint_index) do interface.curr_joint_index = i32(i)
+    }
+    im.EndCombo()
+  }
+
+  if interface.curr_joint_index >= i32(len(level.revolute_joint_defs)) do return false
+
+  joint_def := &level.revolute_joint_defs[interface.curr_joint_index]
+  old_def   := joint_def^
+
+  if interface_edit_joint_common(cast(^joint_common)joint_def, interface) do return true
+
+  /*
+    Highlight the bodies here 
+  */
+
+  im.SliderFloat2("localAnchorA",  &joint_def.localAnchorA, -5, 5)
+  im.SliderFloat2("localAnchorB",  &joint_def.localAnchorB, -5, 5)
+  im.SliderFloat("Refresh angle",  &joint_def.referenceAngle, 0, 100)
+  im.SliderFloat("Target  angle",  &joint_def.targetAngle, 0, 100)
+  im.Checkbox("Enable Spring",     &joint_def.enableSpring)
+  im.InputFloat("Hertz ",          &joint_def.hertz)
+  im.InputFloat("Damping Ratio",   &joint_def.dampingRatio)
+  im.InputFloat("Lower Angle",     &joint_def.lowerAngle)
+  im.InputFloat("Upper Angle",     &joint_def.upperAngle)
+  im.InputFloat("Max Motor Limit", &joint_def.maxMotorTorque)
+  im.InputFloat("Motor Speed",     &joint_def.motorSpeed)
+  im.InputFloat("Draw Size",       &joint_def.drawSize)
+  im.Checkbox("Enable Motor",      &joint_def.enableMotor)
+  im.Checkbox("Enable Limit",      &joint_def.enableLimit)
+  im.Checkbox("Collide Connected", &joint_def.collideConnected)
+  
+  return old_def != joint_def^
+}