use <../libs/triangles.scad>;

exhaust_x = 3; // excluding standoff
exhaust_y = 10;
exhaust_z = 33;
exhaust_standoff = 1;

exhaust_notch_z = 2;
exhaust_notch_spacing = 1.5;
exhaust_notch_height = 28;

cylinder_faces = 20;
c_f = cylinder_faces;
zff = 0.01;
track_x = 12;
track_y = 100;
track_z = 40;

track_bottom_chamfer = track_z/2.5;
track_front_chamfer_angle = 45;
track_rear_chamfer_angle = 45;
track_rear_chamfer_ratio = 1.2;

track_cutout_depth = 2;

track_rear_cutout_y = 10;
track_rear_cutout_z = 16;
//track_rear_cutout_angle = 40;
track_rear_cutout_angle = 40;

track_rear_cutout_y_dist = 10;
track_rear_cutout_z_dist = 5;
track_rear_cutout_diag_length = 13;

rear_exhaust_offset = 5;

module whole()
{


}

module track()
{
	trc_y = track_rear_cutout_y;
	trc_z = track_rear_cutout_z;
	trc_y_d = track_rear_cutout_y_dist;
	trc_z_d = track_rear_cutout_z_dist;
	union()
	{

		difference()
		{
			cube([track_x, track_y, track_z]);
			// Corner chamfers
			translate([0,0,-(track_bottom_chamfer/2)]) rotate([45,0,0]) cube([track_x,track_bottom_chamfer/sqrt(2),track_bottom_chamfer/sqrt(2)]);
			translate([0,track_y,-(track_bottom_chamfer/2)]) rotate([45,0,0]) cube([track_x,track_bottom_chamfer/sqrt(2),track_bottom_chamfer/sqrt(2)]);

			translate([0,track_y,track_bottom_chamfer]) rotate([track_front_chamfer_angle,0,0]) cube([track_x,100,(track_z - track_bottom_chamfer)/sin(track_front_chamfer_angle)]);
			translate([0,0,track_bottom_chamfer*track_rear_chamfer_ratio])
				rotate([track_rear_chamfer_angle,0,0])
					tread_rear_chamfer();

			// Face cutouts
			/*#translate([track_x-track_cutout_depth,trc_y_d,trc_z_d]) cube([track_cutout_depth,trc_y,trc_z]);
			#translate([track_x-track_cutout_depth+zff,trc_y_d+tan(track_rear_cutout_angle)*trc_y*sin(track_rear_cutout_angle*2)/2,trc_z_d+trc_z-trc_y*sin(track_rear_cutout_angle*2)/2])
				rotate([track_rear_cutout_angle,0,0])
					cube([track_cutout_depth,trc_y*cos(track_rear_cutout_angle),30]);
			#translate([track_x-track_cutout_depth+zff,trc_y_d+tan(track_rear_cutout_angle)*trc_y*sin(track_rear_cutout_angle*2)/2,trc_z_d+trc_z-trc_y*sin(track_rear_cutout_angle*2)/2])
				rotate([track_rear_cutout_angle,0,0])
					cube([track_cutout_depth,trc_y*cos(track_rear_cutout_angle),30]);*/

			//#translate([0,trc_y_d,trc_z_d+trc_z-trc_y*sin(track_rear_cutout_angle*2)/2])
			#translate([0,5,25])
				rotate([track_rear_chamfer_angle,0,0])
					cube([track_x,trc_y*cos(track_rear_cutout_angle),track_cutout_depth]);


		}
		// Face additions
		//translate([track_x,40,17]) import("predator_exhaust.stl");
		translate([track_x,(track_z - track_bottom_chamfer*track_rear_chamfer_ratio)/tan(track_rear_chamfer_angle)+exhaust_y/2+rear_exhaust_offset,track_z-exhaust_z]) exhaust();
		translate([track_x,exhaust_y/2+track_y-(track_z - track_bottom_chamfer)/cos(track_front_chamfer_angle),track_z-exhaust_z]) exhaust();
	}
}

module tread_rear_chamfer()
{
	trc_y = track_rear_cutout_y;
	trc_z = track_rear_cutout_z;
	trc_y_d = track_rear_cutout_y_dist;
	trc_z_d = track_rear_cutout_z_dist;

	temp = -91 ;
	echo(temp);

	trc_y_v = (track_z-track_bottom_chamfer*track_rear_chamfer_ratio)/sin(track_rear_chamfer_angle);

	cube([track_x,trc_y_v,60]);
	translate([0,trc_y_v/2-trc_y*cos(track_rear_cutout_angle)/2,-track_cutout_depth])
		cube([track_x,trc_y*cos(track_rear_cutout_angle),track_cutout_depth]);

	translate([track_x-track_cutout_depth,trc_y_v/2-trc_y*cos(track_rear_cutout_angle)/2,-track_rear_cutout_diag_length])
		cube([track_cutout_depth,trc_y*cos(track_rear_cutout_angle),track_rear_cutout_diag_length]);

	//translate([track_x-track_cutout_depth,0,-track_rear_cutout_diag_length*2])

	//translate([0,0,0])
		rotate([temp,0,0])
			cube([track_cutout_depth,trc_y,trc_z]);

	/*#translate([track_x-track_cutout_depth,trc_y_d,trc_z_d]) cube([track_cutout_depth,trc_y,trc_z]);
	#translate([track_x-track_cutout_depth+zff,trc_y_d+tan(track_rear_cutout_angle)*trc_y*sin(track_rear_cutout_angle*2)/2,trc_z_d+trc_z-trc_y*sin(track_rear_cutout_angle*2)/2])
		rotate([track_rear_cutout_angle,0,0])
			cube([track_cutout_depth,trc_y*cos(track_rear_cutout_angle),30]);*/

}

module exhaust()
{
	exh_x = exhaust_x;
	exh_y = exhaust_y;
	exh_z = exhaust_z;
	exh_s = exhaust_standoff;

	difference()
	{
		union()
		{
			translate([exh_s,-exh_y/2,0]) cube([exh_x,exh_y,exh_z]);
			translate([0,-exh_y/2,0]) cube([exh_s,exh_y,exh_z]);
		}
		translate([exhaust_standoff,-25,0]) rotate([0,30,0]) cube([20,50,20]); // Chamfer at the bottom
		// Chamfer on the sides
		translate([exhaust_standoff+exh_x,(exh_y/2)-exh_x,0]) rotate([0,0,45]) cube([exh_x*sqrt(2),exh_x*sqrt(2),exh_z]);
		translate([exhaust_standoff+exh_x,-(exh_y/2)-exh_x,0]) rotate([0,0,45]) cube([exh_x*sqrt(2),exh_x*sqrt(2),exh_z]);


		for (n = [0:2])
		{
			translate([0,1,exhaust_notch_height-n*(exhaust_notch_z+exhaust_notch_spacing)]) exhaust_notch();
			translate([0,-1,exhaust_notch_height-n*(exhaust_notch_z+exhaust_notch_spacing)]) translate([0,0,exhaust_notch_z]) rotate([180,0,0]) exhaust_notch();
		}
	}
	difference()
	{
		translate([(exhaust_x+exhaust_standoff)/2,0,exhaust_z]) cylinder(r=2,h=2,$fn=c_f);
		translate([(exhaust_x+exhaust_standoff)/2,0,exhaust_z+1.5]) cylinder(r=1,h=2,$fn=c_f);
	}
}


module exhaust_notch()
{
	exh_n_z = exhaust_notch_z;
	devisor_x = 1.8;
	devisor_y = 6;

	difference()
	{
		cube([10,10,exh_n_z]);
		cube([exhaust_x/devisor_x,exhaust_y/devisor_y,exh_n_z]);
		translate([0,exhaust_y/devisor_y,0,]) triangle(exhaust_y/devisor_y,exhaust_x/devisor_x,exh_n_z);
	}
}


render(convexity = 1)
{
	//track();
	tread_rear_chamfer();
	//exhaust();
}