Initial commit

Torque/SDK/engine/game/vehicles/guiSpeedometer.cc

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+//-----------------------------------------------------------------------------
+// Torque Game Engine
+// Copyright (C) GarageGames.com, Inc.
+//-----------------------------------------------------------------------------
+
+#include "dgl/dgl.h"
+#include "gui/controls/guiBitmapCtrl.h"
+#include "console/consoleTypes.h"
+#include "game/gameConnection.h"
+#include "game/vehicles/vehicle.h"
+
+//-----------------------------------------------------------------------------
+/// A Speedometer control.
+/// This gui displays the speed of the current Vehicle based
+/// control object. This control only works if a server
+/// connection exists and it's control object is a vehicle. If
+/// either of these requirements is false, the control is not rendered.
+class GuiSpeedometerHud : public GuiBitmapCtrl
+{
+   typedef GuiBitmapCtrl Parent;
+
+   F32   mSpeed;        ///< Current speed
+   F32   mMaxSpeed;     ///< Max speed at max need pos
+   F32   mMaxAngle;     ///< Max pos of needle
+   F32   mMinAngle;     ///< Min pos of needle
+   Point2F mCenter;     ///< Center of needle rotation
+   ColorF mColor;       ///< Needle Color
+   F32   mNeedleLength;
+   F32   mNeedleWidth;
+   F32   mTailLength;
+
+public:
+   GuiSpeedometerHud();
+
+   void onRender( Point2I, const RectI &);
+   static void initPersistFields();
+   DECLARE_CONOBJECT( GuiSpeedometerHud );
+};
+
+
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_CONOBJECT( GuiSpeedometerHud );
+
+GuiSpeedometerHud::GuiSpeedometerHud()
+{
+   mSpeed = 0;
+   mMaxSpeed = 100;
+   mMaxAngle = 0;
+   mMinAngle = 200;
+   mCenter.set(0,0);
+   mNeedleWidth = 3;
+   mNeedleLength = 10;
+   mTailLength = 5;
+   mColor.set(1,0,0,1);
+}
+
+void GuiSpeedometerHud::initPersistFields()
+{
+   Parent::initPersistFields();
+
+   addGroup("Needle");
+   addField("maxSpeed", TypeF32, Offset( mMaxSpeed, GuiSpeedometerHud ) );
+   addField("minAngle", TypeF32, Offset( mMinAngle, GuiSpeedometerHud ) );
+   addField("maxAngle", TypeF32, Offset( mMaxAngle, GuiSpeedometerHud ) );
+   addField("color", TypeColorF, Offset( mColor, GuiSpeedometerHud ) );
+   addField("center", TypePoint2F, Offset( mCenter, GuiSpeedometerHud ) );
+   addField("length", TypeF32, Offset( mNeedleLength, GuiSpeedometerHud ) );
+   addField("width", TypeF32, Offset( mNeedleWidth, GuiSpeedometerHud ) );
+   addField("tail", TypeF32, Offset( mTailLength, GuiSpeedometerHud ) );
+   endGroup("Needle");
+}
+
+
+//-----------------------------------------------------------------------------
+/**
+   Gui onRender method.
+   Renders a health bar with filled background and border.
+*/
+void GuiSpeedometerHud::onRender(Point2I offset, const RectI &updateRect)
+{
+   // Must have a connection and player control object
+   GameConnection* conn = GameConnection::getConnectionToServer();
+   if (!conn)
+      return;
+   Vehicle* control = dynamic_cast<Vehicle*>(conn->getControlObject());
+   if (!control)
+      return;
+
+   Parent::onRender(offset,updateRect);
+
+   // Use the vehicle's velocity as it's speed...
+   mSpeed = control->getVelocity().len();
+   if (mSpeed > mMaxSpeed)
+      mSpeed = mMaxSpeed;
+
+   // Render the needle
+   glPushMatrix();
+   Point2F center = mCenter;
+   if (center.x == F32(0) && center.y == F32(0)) {
+      center.x = mBounds.extent.x / 2;
+      center.y = mBounds.extent.y / 2;
+   }
+   glTranslatef(mBounds.point.x + center.x,mBounds.point.y + center.y,0);
+
+   F32 rotation = mMinAngle + (mMaxAngle - mMinAngle) * (mSpeed / mMaxSpeed);
+   glRotatef(rotation,0.0f,0.0f,-1.0f);
+
+   glEnable(GL_BLEND);
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+   glDisable(GL_TEXTURE_2D);
+
+   glColor4f(mColor.red, mColor.green, mColor.blue, mColor.alpha);
+   glBegin(GL_LINE_LOOP);
+      glVertex2f(+mNeedleLength,-mNeedleWidth);
+      glVertex2f(+mNeedleLength,+mNeedleWidth);
+      glVertex2f(-mTailLength ,+mNeedleWidth);
+      glVertex2f(-mTailLength ,-mNeedleWidth);
+   glEnd();
+   glPopMatrix();
+}
+
+