let current = GetCurrentScriptDirectory;
function px(){return GetPlayerX;}
function py(){return GetPlayerY;}

function stgw(){return GetStgFrameWidth;}
function stgh(){return GetStgFrameHeight;}

function centerX(){return GetStgFrameWidth/2;}
function centerY(){return GetStgFrameHeight/2;}

task PlayerExplode(path){
	let obj = ObjPrim_Create(OBJ_SPRITE_2D);
	ObjRender_SetBlendType(obj, BLEND_ADD_RGB);
	Obj_SetRenderPriority(obj, 0.60);
	ObjPrim_SetTexture(obj, path);
	ObjSprite2D_SetSourceRect(obj, 0, 0, 63, 63);
	ObjSprite2D_SetDestRect(obj, -32, -32, 32, 32);

	let alpha = 255;
	let scale = 0;
	loop(30){
		scale += 0.2;
		alpha -= 8;
		ObjRender_SetColor(obj, alpha, alpha, alpha);
		ObjRender_SetPosition(obj, GetPlayerX, GetPlayerY, 0);
		ObjRender_SetScaleXYZ(obj, scale, scale, 1);
		yield;
	}
	Obj_Delete(obj);
}

task TMagicCircle {
	let countVertex = 64;
	let listRadius = [];
	loop(countVertex) {
		listRadius = listRadius ~ [0];
	}

	let path = current ~ "img/Default_Player_MagicCircle.png";
	let obj = ObjPrim_Create(OBJ_PRIMITIVE_2D);
	ObjPrim_SetPrimitiveType(obj, PRIMITIVE_TRIANGLESTRIP);
	ObjPrim_SetVertexCount(obj, countVertex);
	ObjRender_SetBlendType(obj, BLEND_ADD_RGB);
	Obj_SetRenderPriority(obj, 0.60);
	ObjPrim_SetTexture(obj, path);
	ascent(iVert in 0..countVertex / 2) {
		let left = iVert * 128;
		let indexVert = iVert * 2;
		ObjPrim_SetVertexUVT(obj, indexVert + 0, left, 0);
		ObjPrim_SetVertexUVT(obj, indexVert + 1, left, 64);		
	}

	let cx = 0;
	let cy = 0;
	let maxRadius = 128;
	let alpha = 0;
	let frame = 0;
	let angleRender = 0;
	let frameInvOld = 0;

	while(true) {
		let frameInv = GetPlayerInvincibilityFrame();

		if(frameInv <= 0) {
			Obj_SetVisible(obj, false);
			frameInvOld = 0;
		}
		else {
			if(frameInvOld == 0) {
				ascent(iVert in 0..countVertex) {
					listRadius[iVert] = 0;
				}
				alpha = 0;
				frame = 0;
			}
			frameInvOld = frameInv;

			let px = GetPlayerX();
			let py = GetPlayerY();

			alpha += 1 / 120;
			alpha = min(alpha, 1);
			angleRender += 360 / countVertex / 2;
			Obj_SetVisible(obj, true);

			frameInv = min(100, frameInv);
			let rRate = frameInv / 100;

			ascent(iVert in 0..countVertex / 2) {
				let indexVert = iVert * 2;
				let angle = 360 / (countVertex / 2 - 1) * iVert;

				let vx1 = listRadius[indexVert] * cos(angle);
				let vy1 = listRadius[indexVert] * sin(angle);
				ObjPrim_SetVertexPosition(obj, indexVert + 0, vx1, vy1, 0);

				let vx2 = listRadius[indexVert+1] * cos(angle);
				let vy2 = listRadius[indexVert+1] * sin(angle);
				ObjPrim_SetVertexPosition(obj, indexVert + 1, vx2, vy2, 0);

				if(frame >= 0) {
					let dr = (maxRadius * rRate - listRadius[indexVert]) / 8;
					listRadius[indexVert] = listRadius[indexVert] + dr;
				}
				if(frame > 10) {
					let rRateIn = rRate - 0.12;
					if(rRateIn < 0){rRateIn=0;}
					let dr= (maxRadius * rRateIn - listRadius[indexVert + 1]) / 16;
					listRadius[indexVert + 1] = listRadius[indexVert + 1] + dr;
				}

			}

			ObjRender_SetColor(obj, 192 * alpha, 192 * alpha, 255 * alpha);
			ObjRender_SetPosition(obj, px, py, 0);
			ObjRender_SetAngleZ(obj, angleRender);

			frame++;
		}

		yield;
	}
}

task GrazePiece{
	let obj = ObjPrim_Create(OBJ_SPRITE_2D);
	ObjPrim_SetTexture(obj, GetCurrentScriptDirectory ~ "img/graze_eff.png");
	ObjSprite2D_SetSourceRect(obj, 0, 0, 32, 32);
	ObjSprite2D_SetDestCenter(obj);
	ObjRender_SetBlendType(obj, BLEND_ADD_RGB);
	ObjRender_SetScaleXYZ(obj, 0.2, 0.2, 0.2);
	ObjRender_SetPosition(obj, GetPlayerX, GetPlayerY, 0);

	let s = 0.2;
	let a = rand(0, 360);
	let x = GetPlayerX;
	let y = GetPlayerY;
	while(s > 0){
		ObjRender_SetScaleXYZ(obj, s, s, s);
		ObjRender_SetPosition(obj, x, y, 0);
		s -= 0.01;
		x += 10*cos(a);
		y += 10*sin(a);
		yield;
	}
	Obj_Delete(obj);
}