drawAgentHeading

Draws and indicator to show which way an agent is facing.

void drawAgentHeading(iAgent* agent, tSigned32 size, tSigned32 height, float heading);

	agent		The object will be drawn at this agent's current position. The agent must be on the currently set mesh.
	size		Controls the size of the indicator.
	height		Specifies the height at which to place the indicator. Set this to the same value as was used to draw the agent.

To draw an agent with a heading indicator, call iTestBed::drawAgent() followed by this method, with the same value for height.

If there is no currently set mesh then this function returns with no effect.

The indicator will be drawn in the testbed's current colour.