皮卡丘打排球 | JavaScript 程式專案

{"id":4718,"student_id":888,"content":"var X_LIMIT = 640; //右邊界\nvar Y_LIMIT =480; // 下邊界\nvar A_FRAME_TIME = 1.0/60.0; // 一個 frame 經過時間\nvar GRAVITY = 600.0; // 重力參數\nvar MOVING_SPEED = 10; // 移動速度\nvar PIKACHU_JUMP_FORCE = -300;\n\nvar ball_vector = [0.0, 0.0]; // 球的速度向量\nvar left_pikachu_vector = [0.0, 0.0]; // 左邊皮卡丘速度向量\nvar left_pikachu_jumping = false; // 左邊皮卡丘是否跳躍\nvar right_pikachu_vector = [0.0, 0.0]; // 右邊皮卡丘速度向量\nvar right_pikachu_jumping = false; // 右邊皮卡丘是否跳躍\n\nvar point1 = 0;\nvar point2 = 0;\n\nvar background = Game.createSprite('bg.jpg');\nvar stick = Game.createSprite({\n    x: 320,\n    y: 440,\n    scale: 1,\n    costumes: [\"stick.jpg\"]\n  });\n\nvar left_pikachu = Game.createSprite({\n    x: 40,\n    y: 417,\n    scale: 2,\n    costumes: [\"pikaAt1.png\"]\n  });\n\nvar right_pikachu = Game.createSprite({\n    x: 600,\n    y: 417,\n    scale: 2,\n    costumes: [\"pikaToRight.png\"]\n  });\n\nvar ball = Game.createSprite({\n    x: 200,\n    y: 100,\n    scale: 1,\n    costumes: [\"pikaBall.png\"]\n});\ninitBall();\n\nforever(()=\u003e {\n    // 球的速度加上重力加速度\n    ball_vector[1] += GRAVITY * A_FRAME_TIME;\n    \n    // 計算球的位置\n    ball.x += ball_vector[0] * A_FRAME_TIME;\n    ball.y += ball_vector[1] * A_FRAME_TIME;\n    \n    // 左皮卡丘跳躍\n    if(left_pikachu_jumping) {\n      // 左皮卡丘速度加上重力加速度\n      left_pikachu_vector[1] += GRAVITY * A_FRAME_TIME;\n        \n      // 計算左皮卡丘位置\n      left_pikachu.y += left_pikachu_vector[1] * A_FRAME_TIME * 2;\n      \n      // 若觸地則重設參數\n      if (left_pikachu.y \u003e= 417) {\n        left_pikachu.y = 417;\n        left_pikachu_jumping = false;\n      }\n    }\n    \n    // 右皮卡丘跳躍\n    if(right_pikachu_jumping) {\n      // 右皮卡丘速度加上重力加速度\n      right_pikachu_vector[1] += GRAVITY * A_FRAME_TIME;\n      \n      // 計算左皮卡丘位置\n      right_pikachu.y += right_pikachu_vector[1] * A_FRAME_TIME * 2;\n      \n      // 若觸地則重設參數\n      if (right_pikachu.y \u003e= 417) {\n        right_pikachu.y = 417;\n        right_pikachu_jumping = false;\n      }\n    }\n});\n\n// 球碰到邊界反彈\n// 0.8 為彈跳減速\nforever(()=\u003e {\n    if(ball.x \u003c 0) {\n        ball_vector[0] *= -0.8;\n        ball.x = 0;\n    }\n\n    if(ball.x \u003e 640) {\n        ball_vector[0] *= -0.8;\n        ball.x = 640;\n    }\n\n    if(ball.y \u003c 0) {\n        ball_vector[1] *= -0.8;\n        ball.y = 0;\n    }\n    \n    if(ball.y \u003e 440) {\n        ball_vector[1] *= -0.8;\n        ball.y = 440;\n        if(ball.x \u003e 300) {\n            point1 += 1;\n            initBall('right');\n        } else {\n            point2 += 1;\n            initBall('left');\n        }\n\t\tif(point1 \u003e= 5 || point2 \u003e= 5) {\n            point1 = point2 = 0;\n            alert('遊戲結束');\n            initBall();\n        }\n    }\n    print(point2, 600, 10, 'red', 50);\n    print(point1, 15, 10, 'red', 50);\n});\n\nfunction initBall(start) {\n    if(start == 'left') ball.x = 150;\n    else if(start == 'right') ball.x = 450;\n    else ball.x = Math.random() \u003e 0.5 ? 150 : 450;\n    ball.y = 50;\n\tball_vector = [0, 0];\n}\n\n// 球碰到皮卡丘行為\nleft_pikachu.on(\"touch\", ball, function(){\n    // 計算彈跳方向\n    let x = ball.x - left_pikachu.x;\n    let y = ball.y - left_pikachu.y;\n    let ball_vector_length = Math.sqrt(ball_vector[0]**2 + ball_vector[1]**2);\n    let diff_vector_length = Math.sqrt(x**2 + y**2);\n    let ratio = ball_vector_length / diff_vector_length;\n    \n    // 1.2 為皮卡丘對球加速參數\n    ball_vector[0] = x * ratio * 1.2;\n    ball_vector[1] = y * ratio * 1.2;\n});\n\nright_pikachu.on(\"touch\", ball, function(){\n    // 計算彈跳方向\n    let x = ball.x - right_pikachu.x;\n    let y = ball.y - right_pikachu.y;\n    let ball_vector_length = Math.sqrt(ball_vector[0]**2 + ball_vector[1]**2);\n    let diff_vector_length = Math.sqrt(x**2 + y**2);\n    let ratio = ball_vector_length / diff_vector_length;\n    \n    // 1.2 為皮卡丘對球加速參數\n    ball_vector[0] = x * ratio * 1.2;\n    ball_vector[1] = y * ratio * 1.2;\n});\n\n// 球碰到柱子反彈\n// @TODO: 有球卡住 bug\nGame.on(\"touch\", [stick, ball], function(){\n    ball_vector[0] *= -0.8;\n});\n\n// 右皮卡丘移動\nGame.on('holding','left', function() {\n\tif (right_pikachu.x \u003e 390) {\n      right_pikachu.x -= MOVING_SPEED;\n    }\n});\n\nGame.on('holding','right', function() {\n   if (right_pikachu.x \u003c X_LIMIT) {\n      right_pikachu.x += MOVING_SPEED;\n   }\n});\n\nGame.on('holding','up', function() {\n\tif (!right_pikachu_jumping) {\n      right_pikachu_vector[1] = PIKACHU_JUMP_FORCE;\n      right_pikachu_jumping = true;\n    }\n});\n/////////////\n\n// 左皮卡丘移動\nGame.on('holding','a', function() {\n\tif (left_pikachu.x \u003e -20) {\n      left_pikachu.x -= MOVING_SPEED;\n    }\n});\n\nGame.on('holding','d', function() {\n   if (left_pikachu.x \u003c X_LIMIT / 2 - 65) {\n      left_pikachu.x += MOVING_SPEED;\n   }\n});\n\nGame.on('holding','w', function() {\n\tif (!left_pikachu_jumping) {\n      left_pikachu_vector[1] = PIKACHU_JUMP_FORCE;\n      left_pikachu_jumping = true;\n    }\n});\n/////////////\n\nsetInterval(function(){\n\tconsole.log('ww')\n}, 10000)\n","created_at":"2017-03-01T20:52:04.729+08:00","updated_at":"2019-11-12T09:30:52.897+08:00","name":"皮卡丘打排球","language":"javascript","screenshot":{"url":"https://cdn0.koding.school/uploads/project/screenshot/4718/be1a57cd802a9d9b888268ff72ebd98f.jpg"},"parent_id":2,"plugin":"","description":"風靡一時的皮卡丘打排球遊戲~雙人對戰版！\n\n左邊玩家控制：W, A, S, D\n右邊玩家控制：方向鍵","note":null,"status":"public","like_student_ids":[10,151,1898,1935,2155,3127,3778],"is_featured":true,"views":5654,"hashid":"zpes4pp","is_content_changed":null,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}