#include <acknex.h>
#include <default.c>
#include <ackphysX.h>

ENTITY* movedEnt;

void cubeEvent(){
	// if we have the pointer, function invalid:
	if(movedEnt != NULL){ return; }	
	// we are moving:
	movedEnt = my;
}

void cube(){
	// flags:
	set(my, SHADOW | CAST | LIGHT); 	
	// random color:
	vec_set(my.blue, vector(150 + random(100), random(100), 0));	
	// set random size
	vec_fill(my.scale_x, 0.6 + random(0.4));	
	// activate physics	
	pXent_settype(my, PH_RIGID, PH_BOX);	
	// restitution:
	pXent_setelasticity(my, 30);	
	// set random initial speed	
	pXent_addvelcentral(my, vector(1 - random(2), 1 - random(2), 0));		
	// event type:
	my.emask |= (ENABLE_SHOOT); 	
	// event:
	my.event = cubeEvent;
}

void main(){
	// shadows:
	shadow_stencil = 2;	
	// limit fps:
	fps_max = 60;	
	// open physX engine:
	physX_open();	
	// load empty level:
	level_load("");	
	// place camera:
	vec_set(camera.x, vector(-180, 0, 30));	
	// create ground plate
	ENTITY* ground = ent_create(CUBE_MDL, nullvector, NULL);
	// scale the cube model:
	vec_set(ground.scale_x, vector(20, 20, 1));
	// register it as a static object:
	pXent_settype(ground, PH_STATIC, PH_BOX); 
	// set it's friction:
	pXent_setfriction(ground, 10);	
	// create three cubes:
	ent_create(CUBE_MDL, vector(random(20), random(20), 170), cube);
	ent_create(CUBE_MDL, vector(random(20), random(20), 170), cube);
	ent_create(CUBE_MDL, vector(random(20), random(20), 170), cube);	
	// vector:
	VECTOR temp;	
	// variable:
	var traceTime = 0;	
	// free vector:
	vec_fill(temp.x, 0);	
	// move camera:
	def_move();	
	// loop:
	while(1){
		// define trace position:
		vec_set(temp.x, vector(50, 0, 0));
		vec_rotate(temp.x, camera.pan);
		vec_add(temp.x, camera.x);		
		// draw end position of the trace:
		draw_point3d(temp.x, COLOR_RED, 100, 1);		
		// if we have moving entity:
		if(movedEnt != NULL){			
			// move entity:
			pXent_setposition(movedEnt, temp.x);			
			// if we press mouse left:
			if(mouse_left && traceTime <= 0){				
				// reset pointer:
				movedEnt = NULL;				
				// set timer:
				traceTime = 0.5;				
			}			
		}
		else{			
			// if needed:
			if(traceTime > 0){				
				// count down:
				traceTime -= time_step / 16;				
			}
			else{				
				// define trace mode:
				trace_mode = IGNORE_PASSABLE | IGNORE_PASSENTS | ACTIVATE_SHOOT;				
				// trace:
				c_trace(camera.x, temp.x, trace_mode);				
			}						
		}		
		// wait one frame:
		wait(1);
	}
}