dhewm3-sdk/game/PlayerCursor.cpp

#include "Game_local.h" 
#include "Player.h"
#include "PlayerCursor.h"
#include "renderer/ModelManager.h"

/* 
=============== 
idPlayerCursor::idPlayerCursor 
=============== 
*/ 
idPlayerCursor::idPlayerCursor() { 
   cursorHandle   = -1; 
   created = false; 
}

/* 
=============== 
idPlayerCursor::~idPlayerCursor 
=============== 
*/ 
idPlayerCursor::~idPlayerCursor() { 
   FreeCursor(); 
} 

/* 
=============== 
idPlayerCursor::FreeCursor 
=============== 
Post: tells the game render world to free the cross hair entity, sets the cursor 
handle to -1 and sets created to false 
*/ 
void idPlayerCursor::FreeCursor( void ) { 
   if ( cursorHandle != - 1 ) { 
      gameRenderWorld->FreeEntityDef( cursorHandle ); 
      cursorHandle = -1; 
      created = false; 
   } 
} 

/* 
=============== 
idPlayerCursor::Draw 
=============== 
*/ 
void idPlayerCursor::Draw( const idVec3 &origin, const idMat3 &axis,const char *material) { 
	
	idPlayer *localPlayer = gameLocal.GetLocalPlayer(); 
	trace_t         tr; 
	float          distance = 60; 
	float          length; 
	float          zoomMult; //ivan
	//detemine the point at which the weapon is aiming 
	idAngles angle = axis.ToAngles(); 
	idVec3 endPos = (origin + (angle.ToForward() * 120000.0f)); 
	gameLocal.clip.TracePoint(tr,origin,endPos,MASK_SHOT_RENDERMODEL,localPlayer); 
	endPos = tr.endpos; 

	//find the distance from the camera to the point at which the weapon is aiming 
	idMat3 cameraAxis = localPlayer->GetRenderView()->viewaxis; 
	idVec3 cameraOrigin = localPlayer->GetRenderView()->vieworg; 
	idVec3 vectorLength = endPos - cameraOrigin; 
	length = vectorLength.Length();

	zoomMult = 90.0f/localPlayer->CalcFov( true ); //ivan
	//gameLocal.Printf( "zoom: %f\n",zoomMult ); //ivan

	length = zoomMult*distance/length; //ivan - zoomMult forces constant cursor size 

	//linearly interpolate 5 feet between the camera position and the point at which the weapon is aiming 
	endPos.Lerp(cameraOrigin,endPos,length); 

	if ( !CreateCursor(localPlayer, endPos, cameraAxis,material )) { 
	  UpdateCursor(localPlayer,  endPos, cameraAxis); 
	} 
}

/* 
=============== 
idPlayerCursor::CreateCursor 
=============== 
*/ 
bool idPlayerCursor::CreateCursor( idPlayer *player, const idVec3 &origin, const idMat3 &axis, const char *material ) { 
   const char *mtr =  material; 
   int out = cursorHandle; 
   if ( out >= 0 ) { 
      return false; 
   } 
   FreeCursor(); 
   memset( &renderEnt, 0, sizeof( renderEnt ) ); 
   renderEnt.origin   = origin; 
   renderEnt.axis      = axis; 
   renderEnt.shaderParms[ SHADERPARM_RED ]            = 1.0f; 
   renderEnt.shaderParms[ SHADERPARM_GREEN ]         = 1.0f; 
   renderEnt.shaderParms[ SHADERPARM_BLUE ]         = 1.0f; 
   renderEnt.shaderParms[ SHADERPARM_ALPHA ]         = 1.0f; 
   renderEnt.shaderParms[ SHADERPARM_SPRITE_WIDTH ]   = 7.0f; 
   renderEnt.shaderParms[ SHADERPARM_SPRITE_HEIGHT ]   = 7.0f; 
   renderEnt.hModel = renderModelManager->FindModel( "_sprite" ); 
   renderEnt.callback = NULL; 
   renderEnt.numJoints = 0; 
   renderEnt.joints = NULL; 
   renderEnt.customSkin = 0; 
   renderEnt.noShadow = true; 
   renderEnt.noSelfShadow = true; 
   renderEnt.customShader = declManager->FindMaterial( mtr ); 
   renderEnt.referenceShader = 0; 
   renderEnt.bounds = renderEnt.hModel->Bounds( &renderEnt ); 
   cursorHandle = gameRenderWorld->AddEntityDef( &renderEnt ); 

   //AddRenderGui( temp, &renderEnt->gui[ 0 ], args ); //ivan
   //renderEnt.gui[ 0 ] = uiManager->FindGui( "guis/cursor.gui", false, false ); //ivan test
   //if(renderEnt.gui[ 0 ] == NULL) gameLocal.Printf( "renderEnt.gui[ 0 ] == NULL\n"); //ivan test
   return false; 
} 

/* 
=============== 
idPlayerCursor::UpdateCursor 
=============== 
*/ 
void idPlayerCursor::UpdateCursor(idPlayer* player,  const idVec3 &origin, const idMat3 &axis) { 
   assert( cursorHandle >= 0 ); 
   renderEnt.origin = origin; 
   renderEnt.axis   = axis; 
   gameRenderWorld->UpdateEntityDef( cursorHandle, &renderEnt ); 
}