forked from 0ad/0ad
345 lines
9.2 KiB
C++
Executable File
345 lines
9.2 KiB
C++
Executable File
// Last modified: May 15 2004, Mark Thompson (mark@wildfiregames.com)
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#include "Entity.h"
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#include "EntityManager.h"
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#include "BaseEntityCollection.h"
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#include "Renderer.h"
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#include "Model.h"
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#include "Terrain.h"
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CEntity::CEntity( CBaseEntity* base, CVector3D position, float orientation )
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{
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// Set our parent unit and build us an actor.
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m_base = base;
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m_actor = new CUnit;
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m_actor->m_Object = m_base->m_actorObject;
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m_actor->m_Model = ( m_actor->m_Object->m_Model ) ? m_actor->m_Object->m_Model->Clone() : NULL;
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// Register the actor with the renderer.
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g_UnitMan.AddUnit( m_actor );
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// Set up our instance data
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m_speed = m_base->m_speed;
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m_position = position;
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m_orientation = orientation;
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m_ahead.x = sin( orientation );
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m_ahead.y = cos( orientation );
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if( m_base->m_bound_type == CBoundingObject::BOUND_CIRCLE )
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{
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m_bounds = new CBoundingCircle( m_position.X, m_position.Z, m_base->m_bound_circle );
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}
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else if( m_base->m_bound_type == CBoundingObject::BOUND_OABB )
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{
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m_bounds = new CBoundingBox( m_position.X, m_position.Z, m_ahead, m_base->m_bound_box );
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}
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snapToGround();
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updateActorTransforms();
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// Register the addresses of our native properties with the properties table
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m_properties["speed"] = &m_speed;
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m_properties["orientation"] = &m_orientation;
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m_properties["position"] = &m_position;
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}
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bool isWaypoint( CEntity* e )
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{
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return( e->m_base->m_name == CStr( "Waypoint" ) );
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}
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void CEntity::updateActorTransforms()
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{
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CMatrix3D m;
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m._11 = -m_ahead.y; m._12 = 0.0f; m._13 = -m_ahead.x; m._14 = m_position.X;
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m._21 = 0.0f; m._22 = 1.0f; m._23 = 0.0f; m._24 = m_position.Y;
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m._31 = m_ahead.x; m._32 = 0.0f; m._33 = -m_ahead.y; m._34 = m_position.Z;
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m._41 = 0.0f; m._42 = 0.0f; m._43 = 0.0f; m._44 = 1.0f;
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/* Equivalent to:
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m.SetYRotation( m_orientation );
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m.Translate( m_position );
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But the matrix multiplication seemed such a waste when we already have a forward vector
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*/
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m_actor->m_Model->SetTransform( m );
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}
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float CEntity::getExactGroundLevel( float x, float y )
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{
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// TODO MT: If OK with Rich, move to terrain core. Once this works, that is.
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x /= 4.0f;
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y /= 4.0f;
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int xi = (int)floor( x );
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int yi = (int)floor( y );
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float xf = x - (float)xi;
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float yf = y - (float)yi;
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u16* heightmap = g_Terrain.GetHeightMap();
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unsigned long mapsize = g_Terrain.GetVerticesPerSide();
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float h00 = heightmap[yi*mapsize + xi];
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float h01 = heightmap[yi*mapsize + xi + mapsize];
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float h10 = heightmap[yi*mapsize + xi + 1];
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float h11 = heightmap[yi*mapsize + xi + mapsize + 1];
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/*
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if( xf < ( 1.0f - yf ) )
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{
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return( HEIGHT_SCALE * ( ( 1 - xf - yf ) * h00 + xf * h10 + yf * h01 ) );
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}
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else
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return( HEIGHT_SCALE * ( ( xf + yf - 1 ) * h11 + ( 1 - xf ) * h01 + ( 1 - yf ) * h10 ) );
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*/
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/*
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if( xf > yf )
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{
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return( HEIGHT_SCALE * ( ( 1 - xf ) * h00 + ( xf - yf ) * h10 + yf * h11 ) );
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}
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else
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return( HEIGHT_SCALE * ( ( 1 - yf ) * h00 + ( yf - xf ) * h01 + xf * h11 ) );
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*/
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return( HEIGHT_SCALE * ( ( 1 - yf ) * ( ( 1 - xf ) * h00 + xf * h10 ) + yf * ( ( 1 - xf ) * h01 + xf * h11 ) ) );
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}
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void CEntity::snapToGround()
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{
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m_position.Y = getExactGroundLevel( m_position.X, m_position.Z );
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}
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void CEntity::update( float timestep )
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{
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while( !m_orderQueue.empty() )
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{
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CEntityOrder* current = &m_orderQueue.front();
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switch( current->m_type )
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{
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case CEntityOrder::ORDER_GOTO_NOPATHING:
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case CEntityOrder::ORDER_GOTO_COLLISION:
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{
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CVector2D delta;
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delta.x = (float)current->m_data[0].location.x - m_position.X;
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delta.y = (float)current->m_data[0].location.y - m_position.Z;
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m_ahead = delta.normalize();
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if( m_bounds->m_type == CBoundingObject::BOUND_OABB )
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((CBoundingBox*)m_bounds)->setOrientation( m_ahead );
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float len = delta.length();
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float scale = timestep * m_speed;
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if( scale > len )
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scale = len;
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delta = m_ahead * scale;
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m_position.X += delta.x;
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m_position.Z += delta.y;
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m_bounds->setPosition( m_position.X, m_position.Z );
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HEntity collide = getCollisionObject();
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if( collide )
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{
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// Hit something. Take a step back.
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m_position.X -= delta.x;
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m_position.Z -= delta.y;
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m_bounds->setPosition( m_position.X, m_position.Z );
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// Are we still hitting it?
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if( collide->m_bounds->intersects( m_bounds ) )
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{
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// Oh dear. Most likely explanation is that this unit was created
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// within the bounding area of another entity.
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// Try a little boost of speed, to help resolve the situation more quickly.
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m_position.X += delta.x * 2.0f;
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m_position.Z += delta.y * 2.0f;
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m_bounds->setPosition( m_position.X, m_position.Z );
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return;
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}
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if( collide->m_bounds->m_type == CBoundingObject::BOUND_OABB )
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{
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// And it's square.
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// TODO: Implement this case properly.
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// HACK: See if this thing we've hit is likely to be our destination. If so, just skip to our next waypoint.
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// Otherwise, turn right (as with circle collisions)
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if( len < collide->m_bounds->m_radius * 2.0f )
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{
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m_orderQueue.pop_front();
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return;
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}
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else
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{
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CEntityOrder avoidance;
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avoidance.m_type = CEntityOrder::ORDER_GOTO_COLLISION;
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CVector2D right;
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right.x = m_ahead.y; right.y = -m_ahead.x;
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CVector2D avoidancePosition = collide->m_bounds->m_pos + right * ( collide->m_bounds->m_radius * 2.5f );
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avoidance.m_data[0].location = avoidancePosition;
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if( current->m_type == CEntityOrder::ORDER_GOTO_COLLISION )
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m_orderQueue.pop_front();
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m_orderQueue.push_front( avoidance );
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return;
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}
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}
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else
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{
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// A circle.
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// TODO: Implement this properly.
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// Try turning right.
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CEntityOrder avoidance;
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avoidance.m_type = CEntityOrder::ORDER_GOTO_COLLISION;
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CVector2D right;
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right.x = m_ahead.y; right.y = -m_ahead.x;
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CVector2D avoidancePosition = collide->m_bounds->m_pos + right * ( collide->m_bounds->m_radius * 2.5f );
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avoidance.m_data[0].location = avoidancePosition;
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if( current->m_type == CEntityOrder::ORDER_GOTO_COLLISION )
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m_orderQueue.pop_front();
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m_orderQueue.push_front( avoidance );
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return;
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}
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}
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snapToGround();
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updateActorTransforms();
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if( len < 0.1f )
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m_orderQueue.pop_front();
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return;
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break;
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}
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case CEntityOrder::ORDER_GOTO:
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{
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CEntityOrder pathfind_solution;
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pathfind_solution.m_type = CEntityOrder::ORDER_GOTO_NOPATHING;
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pathfind_solution.m_data[0] = current->m_data[0];
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m_orderQueue.pop_front();
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m_orderQueue.push_front( pathfind_solution );
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if( m_actor->m_Model->GetAnimation() != m_actor->m_Object->m_WalkAnim )
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m_actor->m_Model->SetAnimation( m_actor->m_Object->m_WalkAnim );
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break;
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}
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case CEntityOrder::ORDER_PATROL:
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{
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CEntityOrder this_segment;
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CEntityOrder repeat_patrol;
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this_segment.m_type = CEntityOrder::ORDER_GOTO;
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this_segment.m_data[0] = current->m_data[0];
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repeat_patrol.m_type = CEntityOrder::ORDER_PATROL;
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repeat_patrol.m_data[0] = current->m_data[0];
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m_orderQueue.pop_front();
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m_orderQueue.push_front( this_segment );
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m_orderQueue.push_back( repeat_patrol );
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break;
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}
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default:
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assert( 0 && "Invalid entity order" );
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}
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}
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if( m_actor->m_Model->GetAnimation() != m_actor->m_Object->m_IdleAnim )
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m_actor->m_Model->SetAnimation( m_actor->m_Object->m_IdleAnim );
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}
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void CEntity::dispatch( CMessage* msg )
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{
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switch( msg->type )
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{
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case CMessage::EMSG_TICK:
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break;
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case CMessage::EMSG_INIT:
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if( m_base->m_name == CStr( "Prometheus Dude" ) )
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{
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std::vector<HEntity>* waypoints = g_EntityManager.matches( isWaypoint );
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while( !waypoints->empty() )
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{
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CEntityOrder patrol;
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size_t id = rand() % waypoints->size();
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std::vector<HEntity>::iterator it = waypoints->begin();
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it += id;
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HEntity waypoint = *it;
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patrol.m_type = CEntityOrder::ORDER_PATROL;
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patrol.m_data[0].location.x = waypoint->m_position.X;
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patrol.m_data[0].location.y = waypoint->m_position.Z;
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pushOrder( patrol );
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waypoints->erase( it );
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}
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delete( waypoints );
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}
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break;
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}
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}
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void CEntity::pushOrder( CEntityOrder& order )
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{
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m_orderQueue.push_back( order );
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}
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void CEntity::render()
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{
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// Rich! Help! ;)
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// We can loose this later on, I just need a way to see collision boxes temporarily
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glColor3f( 1.0f, 1.0f, 1.0f );
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if( getCollisionObject() ) glColor3f( 0.5f, 0.5f, 1.0f );
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m_bounds->render( m_position.Y + 0.25f );
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}
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HEntity CEntity::getCollisionObject()
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{
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if( !m_bounds ) return( HEntity() );
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std::vector<HEntity>* entities = g_EntityManager.getActive();
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std::vector<HEntity>::iterator it;
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for( it = entities->begin(); it != entities->end(); it++ )
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{
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if( *it == me ) continue;
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if( (*it)->m_bounds )
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if( m_bounds->intersects( (*it)->m_bounds ) )
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{
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HEntity collisionObject = *it;
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delete( entities );
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return( collisionObject );
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}
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}
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delete( entities );
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return( HEntity() );
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}
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HEntity CEntity::getCollisionObject( float x, float y )
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{
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float _x = m_bounds->m_pos.x;
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float _y = m_bounds->m_pos.y;
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m_bounds->setPosition( x, y );
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HEntity _e = getCollisionObject();
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m_bounds->setPosition( _x, _y );
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return( _e );
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}
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void PASAPScenario()
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{
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// Got rid of all the hardcoding that was here.
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} |