ANGLE vecChaseAngOff; // angle of the chase camera
	var vecChaseOffset[3]=  {-150,0,60}; // position of the camera in relation to the chassis center (chase)
	var cameraTPos[3]; // camera target position
	var cameraTAng[3]; // camera target angle
	VECTOR temp, temp2;
	var linSpeed;		// car speed in XY
	ENTITY* pFocus; // the camera will orbit around this entity

....
if (camMode==1) // chase camera?
		{
			reset(pFocus,INVISIBLE);
			if(mouse_right)
			{
				vecChaseAngOff.pan -= rotspd * mouse_force.x * time_step;
				vecChaseAngOff.tilt += rotspd * mouse_force.y * time_step;
				vecChaseAngOff.pan = clamp(vecChaseAngOff.pan, -20, 20);
				vecChaseAngOff.tilt = clamp(vecChaseAngOff.tilt, -20, 20);
			}
			else
			{
				// return to center
				if(vecChaseAngOff.pan > 0.25) {vecChaseAngOff.pan -= 2 * time_step; }
				if(vecChaseAngOff.pan < -0.25) {vecChaseAngOff.pan += 2 * time_step; }
				if(vecChaseAngOff.tilt > 6) {vecChaseAngOff.tilt -= 2 * time_step; }
				if(vecChaseAngOff.tilt < 5) {vecChaseAngOff.tilt += 2 * time_step; }

			}

			vec_set(cameraTPos, vecChaseOffset); // move behind and upwards
			var offset;
			offset = clamp(0.01 * linSpeed * linSpeed, -100, 100);
			cameraTPos[0] -= offset; // offset by speed
			vec_rotate(cameraTPos, vector(ang(pFocus.pan), 0, 0));
			vec_add(cameraTPos, pFocus.x);
			// collide with any object in the way
 			c_trace(pFocus.x,cameraTPos, (IGNORE_PASSABLE+IGNORE_PASSENTS+IGNORE_MODELS));
			if(trace_hit == 1)
 			{
 				// offset from the target along the vector
				vec_set(cameraTPos,target);
				// offset from the wall along normal by the near clipping dist
				vec_normalize(normal,(camera.clip_near / 2));
				vec_add(cameraTPos, normal);
 			}
 			else
			{
				// make sure we don't clip into walls nearby
				vec_diff(temp,pFocus.x, cameraTPos);
				vec_normalize(temp, camera.clip_near);
				vec_rotate(temp, vector(90,0,0));
				vec_set(temp2, cameraTPos);
				vec_add(temp2, temp); // move out by the clip_near value
				c_trace(cameraTPos, temp2, (IGNORE_PASSABLE+IGNORE_PASSENTS+IGNORE_MODELS));
				if(trace_hit == 1)
				{
 					// offset from that target along the vector
					vec_set(cameraTPos, target);
					// offset from the wall along normal by the near clipping dist
					vec_normalize(normal, (camera.clip_near / 2));
					vec_add(cameraTPos,normal);
				}
				else
				{
					// rotate temp back the other dir twice as much..
					vec_rotate(temp, vector(-180, 0, 0));
					vec_set(temp2, cameraTPos);
					vec_add(temp2, temp); // move out by the clip_near value
					c_trace(cameraTPos, temp2, (IGNORE_PASSABLE+IGNORE_PASSENTS+IGNORE_MODELS));
					if(trace_hit == 1)
					{
 						// offset from that target along the vector
						vec_set(cameraTPos, target);
						// offset from the wall along normal by the near clipping dist
						vec_normalize(normal, (camera.clip_near / 2));
						vec_add(cameraTPos, normal);
					}
				}

			}
			// smooth out the transition
	  		vec_diff(temp, cameraTPos, camera.x);
	  		var vscale = clamp((time_step * 0.5), 0.001, 1);
	  		vec_scale(temp, vscale);
	  		vec_add(camera.x, temp);
			// calc angle from camera to target...
			vec_diff(temp, pFocus.x, cameraTPos);
			vec_to_angle(cameraTAng, temp); // camera target angle looks at focus center
  			vec_add(cameraTAng, vecChaseAngOff.pan);  // tweak it
			// smooth out the rotation
		 	vec_diff(temp, cameraTAng, camera.pan);
			temp[0] = ang(temp[0]); // we only need the pan angle
	  		vec_scale(temp, vscale);
	  		vec_add(camera.pan, temp);