• [存档] 大作业进度 3.5 / 5


    <html>
        
        <head>
            <title>Getting over it with HazelNut</title>
        
            <style>
                body {
                    background: #eeeeee;
                    background-image: url(Image/css_background.jpeg);
                    background-repeat: repeat;
                    background-attachment: fixed;
                }
    
                
    
                #canvas {
                    background: #ffffff;
                    cursor: default;
                    display:block;
                    margin:0 auto;
                    -webkit-box-shadow: 4px 4px 8px rgba(0, 0, 0, 0.5);
                    -moz-box-shadow: 4px 4px 8px rgba(0, 0, 0, 0.5);
                    box-shadow: 4px 4px 8px rgba(0, 0, 0, 0.5);
                }
            </style>
        </head>
        
        <body>
            <!-- <div id="game-area" style="position: relative; height: 530px;"></div> -->
            <!-- <audio id='music' src="Sound/Music.mp3" autoplay='autoplay' loop='loop'> </audio> -->
            <audio id='music' src="Sound/Music.mp3" loop='loop'> </audio>
            <canvas id='canvas' width='1000' height='600'> </canvas>
    
            <script src='game.js'></script>
            <script src='option_page.js'></script>
            <script src='help_page.js'></script>
            <script src='about_page.js'></script>
         
        </body>
        
        </html>
    /* ------------------ Main Page ---------------------*/
    
    var canvas = document.getElementById('canvas'),
        context = canvas.getContext('2d'),
        backMusic = document.getElementById('music'),
        main_background = new Image(),
        main_title = new Image(),
        eleSakura = new Image(),
        backPattern = new Image(),
        INDEX = 0, boardSize = 10, errorRate = 0.5,
        cutStep = 0.03, MAX_SIZE = 1.35, 
        SakuraMax = 950, SakuraStep = 13;
        eleSakura.src = "Image/sakura.png";
        backPattern.src = "Image/002.jpg";
    
    function windowToCanvas(x, y) {
        var bbox = canvas.getBoundingClientRect();
        return {
            x: x - bbox.left * (canvas.width / bbox.width),
            y: y - bbox.top * (canvas.height / bbox.height)
        };
    }
    
    var COLOR = ['LightSlateGray', 'lightblue', 'LightCyan', 'LightSteelBlue'],
        TEXT = ['OPTIONS', 'PLAY', 'HELP', 'ABOUT'],
        timer, nowPointer = {},
        updating = true;
    /********************* Function **********************/
    function animateRedraw() {
        if(nowPointer.x > nowPointer.limit) {
            drawFrame();
            timer = requestAnimationFrame(animateRedraw);
        }else cancelAnimationFrame(timer); 
    }
    
    function drawFrame() {
        nowPointer.x -= nowPointer.step;
        nowPointer.alpha += 0.02;
        context.clearRect(0, 0, canvas.width, canvas.height);
        drawMainBack();
        for(var i=0; i<4; i++) {
            if(i != nowPointer.index) {
                drawMainButton(i, 0.5, 150, 355);
            }
        }
        drawMainButton(nowPointer.index, nowPointer.alpha, nowPointer.x, nowPointer.y);
    }
    
    function drawMainButton(Index, Alpha, x, y) {
        context.beginPath();
        context.globalAlpha = Alpha;
        context.arc((Index & 1) * 200 + 150, Math.floor(Index / 2) * 150 + 350, 50, 0, 2 * Math.PI);
        context.fillStyle = COLOR[Index];
        context.fill();
        context.globalAlpha = 1.0;
        context.closePath();
    
        context.font = 20 + 'px Chalkduster';
        context.fillStyle = 'white';
        context.fillText(TEXT[Index], (Index & 1) * 200 + x, Math.floor(Index / 2) * 150 + y);
    }
    
    function drawMainBack() {
        context.drawImage(main_background, 0, 0, canvas.width, canvas.height);
        context.drawImage(main_title, 600, 50, main_title.width, main_title.height);
        context.font = 10 + 'px Arial';
        context.fillStyle = 'grey';
        context.fillText("All Copyright Reserved @2017 HazelNut", 400, 590);
    }
    
    /********************** Events ***********************/
    canvas.onmousemove = function (e) {
        var loc = windowToCanvas(e.clientX, e.clientY);
    
        if(INDEX === 0) {
            if((loc.x - 150) * (loc.x - 150) + (loc.y - 350) * (loc.y - 350) <= 50 * 50) {
                canvas.style.cursor = 'pointer';
    
                if(updating) {
                    nowPointer.index = 0;
                    nowPointer.x = 150;
                    nowPointer.y = 355;
                    nowPointer.alpha = 0.5;
                    nowPointer.step = (150 - 105) / 10;
                    nowPointer.limit = 105;
    
                    cancelAnimationFrame(timer);
                    timer = requestAnimationFrame(animateRedraw);
                }
    
                updating = false;
            } else if((loc.x - 350) * (loc.x - 350) + (loc.y - 350) * (loc.y - 350) <= 50 * 50) {
                canvas.style.cursor = 'pointer';
    
                if(updating) {
                    nowPointer.index = 1;
                    nowPointer.x = 150;
                    nowPointer.y = 355;
                    nowPointer.alpha = 0.5;
                    nowPointer.step = (150 - 124) / 10;
                    nowPointer.limit = 124;
    
                    cancelAnimationFrame(timer);
                    timer = requestAnimationFrame(animateRedraw);
                }
    
                updating = false;
            } else if((loc.x - 150) * (loc.x - 150) + (loc.y - 500) * (loc.y - 500) <= 50 * 50) {
                canvas.style.cursor = 'pointer';
    
                if(updating) {
                    nowPointer.index = 2;
                    nowPointer.x = 150;
                    nowPointer.y = 355;
                    nowPointer.alpha = 0.5;
                    nowPointer.step = (150 - 124) / 10;
                    nowPointer.limit = 124;
    
                    cancelAnimationFrame(timer);
                    timer = requestAnimationFrame(animateRedraw);
                }
    
                updating = false;
            } else if((loc.x - 350) * (loc.x - 350) + (loc.y - 500) * (loc.y - 500) <= 50 * 50) {
                canvas.style.cursor = 'pointer';
    
                if(updating) {
                    nowPointer.index = 3;
                    nowPointer.x = 150;
                    nowPointer.y = 355;
                    nowPointer.alpha = 0.5;
                    nowPointer.step = (150 - 115) / 10;
                    nowPointer.limit = 115;
    
                    cancelAnimationFrame(timer);
                    timer = requestAnimationFrame(animateRedraw);
                }
                
                updating = false;
            } else {
                updating = true;
                canvas.style.cursor = 'default';
                drawMainBack();
                for(var i=0; i<4; i++) {
                    drawMainButton(i, 0.5, 150, 355);
                }
            }
        } else if(INDEX === 1) {
            if(loc.x >= op_coordi[2] && loc.x <= op_coordi[2] + op_selectTXT[1].length * 25 && loc.y <= op_coordi[3] && loc.y >= op_coordi[3] - 50) {
                if(op_seleMusic != 1) {
                    canvas.style.cursor = 'pointer';
                    updateOpPage(1);
                }
            } else if(loc.x >= op_coordi[4] && loc.x <= op_coordi[4] + op_selectTXT[2].length * 25 && loc.y <= op_coordi[5] && loc.y >= op_coordi[5] - 50) {
                if(op_seleMusic != 2) {
                    canvas.style.cursor = 'pointer';
                    updateOpPage(2);
                }
            } else if(loc.x >= op_coordi[8] && loc.x <= op_coordi[8] + op_selectTXT[4].length * 25 && loc.y <= op_coordi[9] && loc.y >= op_coordi[9] - 50) {
                if(op_seleScale != 4) {
                    canvas.style.cursor = 'pointer';
                    updateOpPage(4);
                }
            } else if(loc.x >= op_coordi[10] && loc.x <= op_coordi[10] + op_selectTXT[5].length * 25 && loc.y <= op_coordi[11] && loc.y >= op_coordi[11] - 50) {
                if(op_seleScale != 5) {
                    canvas.style.cursor = 'pointer';
                    updateOpPage(5);
                }
            } else if(loc.x >= op_coordi[12] && loc.x <= op_coordi[12] + op_selectTXT[6].length * 25 && loc.y <= op_coordi[13] && loc.y >= op_coordi[13] - 50) {
                if(op_seleScale != 6) {
                    canvas.style.cursor = 'pointer';
                    updateOpPage(6);
                }
            } else if(loc.x >= op_coordi[16] && loc.x <= op_coordi[16] + op_selectTXT[8].length * 25 && loc.y <= op_coordi[17] && loc.y >= op_coordi[17] - 50) {
                if(op_seleScale != 8) {
                    canvas.style.cursor = 'pointer';
                    updateOpPage(8);
                }
            } else if(loc.x >= op_coordi[18] && loc.x <= op_coordi[18] + op_selectTXT[9].length * 25 && loc.y <= op_coordi[19] && loc.y >= op_coordi[19] - 50) {
                if(op_seleScale != 9) {
                    canvas.style.cursor = 'pointer';
                    updateOpPage(9);
                }
            } else if(loc.x >= op_coordi[20] && loc.x <= op_coordi[20] + op_selectTXT[10].length * 25 && loc.y <= op_coordi[21] && loc.y >= op_coordi[21] - 50) {
                if(op_seleScale != 10) {
                    canvas.style.cursor = 'pointer';
                    updateOpPage(10);
                }
            } else if(loc.x >= op_coordi[22] && loc.x <= op_coordi[22] + op_selectTXT[11].length * 12 && loc.y <= op_coordi[23] && loc.y >= op_coordi[23] - 30) {
                canvas.style.cursor = 'pointer';
                if(op_back) {
                    cancelAnimationFrame(timer);
                    timer = requestAnimationFrame(animateOpSakura);
                }
                op_back = false;
            } else {
                op_back = true;
                op_backAppear = op_coordi[22] - 50;
                canvas.style.cursor = 'default';
                updateOpPage(-1);
            }
        } else if(INDEX === 2) {
    
        } else if(INDEX === 3) {
            /* Help */
            if(loc.x >= op_coordi[22] && loc.x <= op_coordi[22] + op_selectTXT[11].length * 12 && loc.y <= op_coordi[23] && loc.y >= op_coordi[23] - 30) {
                canvas.style.cursor = 'pointer';
                if(hp_back) {
                    cancelAnimationFrame(timer);
                    timer = requestAnimationFrame(animateHpSakura);
                }
                hp_back = false;
            } else {
                hp_back = true;
                hp_backAppear = op_coordi[22] - 50;
                canvas.style.cursor = 'default';
                drawHpBack();
                outputHelp();
            }
        } else if(INDEX === 4) {
            /* About */
            if(loc.x >= op_coordi[22] && loc.x <= op_coordi[22] + op_selectTXT[11].length * 12 && loc.y <= op_coordi[23] && loc.y >= op_coordi[23] - 30) {
                canvas.style.cursor = 'pointer';
                if(ab_back) {
                    cancelAnimationFrame(timer);
                    timer = requestAnimationFrame(animateAbSakura);
                }
                ab_back = false;
            } else {
                ab_back = true;
                ab_backAppear = op_coordi[22] - 50;
                canvas.style.cursor = 'default';
                drawAbBack();
                outputAbout();
            }
        }
    };
    
    canvas.onmousedown = function (e) {
        var loc = windowToCanvas(e.clientX, e.clientY);
        if(INDEX === 0) {
            /* ----> Main <----- */
            updating = true;
            if((loc.x - 150) * (loc.x - 150) + (loc.y - 350) * (loc.y - 350) <= 50 * 50) {
                 /* Option */
                INDEX = 1;
                canvas.style.cursor = 'default';
                drawOpPage();
            } else if((loc.x - 350) * (loc.x - 350) + (loc.y - 350) * (loc.y - 350) <= 50 * 50) {
                
            } else if((loc.x - 150) * (loc.x - 150) + (loc.y - 500) * (loc.y - 500) <= 50 * 50) {
                /* Help */
                INDEX = 3;
                canvas.style.cursor = 'default';
                drawHpPage();
            } else if((loc.x - 350) * (loc.x - 350) + (loc.y - 500) * (loc.y - 500) <= 50 * 50) {
                /* About */
                INDEX = 4;
                canvas.style.cursor = 'default';
                drawAbPage();
            }
        } else if(INDEX === 1) {
            /* ----> Option <---- */
            if(loc.x >= op_coordi[2] && loc.x <= op_coordi[2] + op_selectTXT[1].length * 25 && loc.y <= op_coordi[3] && loc.y >= op_coordi[3] - 50) {
                if(op_seleMusic != 1) {
                    op_seleMusic = 1;
                    backMusic.src = "Sound/Music.mp3"; 
                    updateOpPage(1);
                }
            } else if(loc.x >= op_coordi[4] && loc.x <= op_coordi[4] + op_selectTXT[2].length * 25 && loc.y <= op_coordi[5] && loc.y >= op_coordi[5] - 50) {
                if(op_seleMusic != 2) {
                    op_seleMusic = 2;
                    backMusic.src = "";
                    updateOpPage(2);
                }
            } else if(loc.x >= op_coordi[8] && loc.x <= op_coordi[8] + op_selectTXT[4].length * 25 && loc.y <= op_coordi[9] && loc.y >= op_coordi[9] - 50) {
                if(op_seleScale != 4) {
                    op_seleScale = 4;
                    boardSize = 5;
                    updateOpPage(4);
                }
            } else if(loc.x >= op_coordi[10] && loc.x <= op_coordi[10] + op_selectTXT[5].length * 25 && loc.y <= op_coordi[11] && loc.y >= op_coordi[11] - 50) {
                if(op_seleScale != 5) {
                    op_seleScale = 5;
                    boardSize = 10;
                    updateOpPage(5);
                }
            } else if(loc.x >= op_coordi[12] && loc.x <= op_coordi[12] + op_selectTXT[6].length * 25 && loc.y <= op_coordi[13] && loc.y >= op_coordi[13] - 50) {
                if(op_seleScale != 6) {
                    op_seleScale = 6;
                    boardSize = 20;
                    updateOpPage(6);
                }
            } else if(loc.x >= op_coordi[16] && loc.x <= op_coordi[16] + op_selectTXT[8].length * 25 && loc.y <= op_coordi[17] && loc.y >= op_coordi[17] - 50) {
                if(op_seleScale != 8) {
                    op_seleDiff = 8;
                    errorRate = 0.8;
                    updateOpPage(8);
                }
            } else if(loc.x >= op_coordi[18] && loc.x <= op_coordi[18] + op_selectTXT[9].length * 25 && loc.y <= op_coordi[19] && loc.y >= op_coordi[19] - 50) {
                if(op_seleScale != 9) {
                    op_seleDiff = 9;
                    errorRate = 0.5;
                    updateOpPage(9);
                }
            } else if(loc.x >= op_coordi[20] && loc.x <= op_coordi[20] + op_selectTXT[10].length * 25 && loc.y <= op_coordi[21] && loc.y >= op_coordi[21] - 50) {
                if(op_seleScale != 10) {
                    op_seleDiff = 10;
                    errorRate = 0.2;
                    updateOpPage(10);
                }
            } else if(loc.x >= op_coordi[22] && loc.x <= op_coordi[22] + op_selectTXT[11].length * 15 && loc.y <= op_coordi[23] && loc.y >= op_coordi[23] - 30) {
                INDEX = 0;
                cancelAnimationFrame(timer);
                timer = requestAnimationFrame(animateOpReturn);
    
            }
        } else if(INDEX === 2) {
            /* ----> Play <---- */
        } else if(INDEX === 3) {
            /* ----> Help <---- */
            if(loc.x >= op_coordi[22] && loc.x <= op_coordi[22] + op_selectTXT[11].length * 15 && loc.y <= op_coordi[23] && loc.y >= op_coordi[23] - 30) {
                INDEX = 0;
                cancelAnimationFrame(timer);
                timer = requestAnimationFrame(animateHpReturn);
    
            }
        } else if(INDEX === 4) {
            /* ----> ABOUT <---- */
            if(loc.x >= op_coordi[22] && loc.x <= op_coordi[22] + op_selectTXT[11].length * 15 && loc.y <= op_coordi[23] && loc.y >= op_coordi[23] - 30) {
                INDEX = 0;
                cancelAnimationFrame(timer);
                timer = requestAnimationFrame(animateAbReturn);
    
            }
        }
    };
    /****************** Initialization *******************/
    main_background.src = "Image/mainBack.jpeg";
    main_title.src = "Image/mainTitle2.png";
    main_background.onload = function(e) {
        drawMainBack();
        for(var i=0; i<4; i++) {
            drawMainButton(i, 0.5, 150, 355);
        }
    }
    /* ------------------ Options Page ---------------------*/
    
    var op_scale = 1.0, op_alpha = 1.0;
    var op_selectTXT = ["MUSIC:", "ON", "OFF", "SCALE:", "5 * 5", "10 * 10", "20 * 20", "DIFFICULTY:", "EASY", "MID", "HARD", "Back To Main Menu"];
    var op_coordi = [140, 200, 390, 200, 520, 200, 140, 300, 370, 300, 530, 300, 740, 300, 140, 400, 485, 400, 640, 400, 780, 400, 750, 580];
    var op_seleMusic = 1, op_seleScale = 5, op_seleDiff = 8;
    var op_backAppear = op_coordi[22] - 50, op_back = true;
    
    /********************* Function **********************/
    function drawOpBack() {
        context.clearRect(0, 0, canvas.width, canvas.height);
        context.globalAlpha = op_alpha;
        context.drawImage(main_background, 0, 0, canvas.width * op_scale, canvas.height * op_scale);
        context.globalAlpha = 1.0;
        context.font = 10 + 'px Arial';
        context.fillStyle = 'grey';
        context.fillText("All Copyright Reserved @2017 HazelNut", 400, 590);
    }
    
    function animateOpScale() {
        if(op_scale < MAX_SIZE) {
            drawOpFrame();
            timer = requestAnimationFrame(animateOpScale);
        }else {
            drawOpBack();
            updateOpPage(-1);
            cancelAnimationFrame(timer); 
        }
    }
    
    function drawOpFrame() {
        op_scale += cutStep;
        op_alpha -= cutStep;
        drawOpBack();
    }
    
    function animateOpReturn() {
        if(op_scale > 1.0) {
            opReturnMain();
            timer = requestAnimationFrame(animateOpReturn);
        }else {
            updating = true;
            drawMainBack();
            for(var i=0; i<4; i++) {
                drawMainButton(i, 0.5, 150, 355);
            }
            cancelAnimationFrame(timer); 
        }
    }
    
    function opReturnMain() {
        op_scale -= cutStep;
        op_alpha += cutStep;
        drawOpBack();
    }
    
    function animateOpSakura() {
        if(op_backAppear < SakuraMax) {
            drawOpSakura();
            timer = requestAnimationFrame(animateOpSakura);
        }else {
            cancelAnimationFrame(timer);
        }
    }
    
    function drawOpSakura() {
        op_backAppear += SakuraStep;
        updateOpPage(-1);
        context.globalAlpha = 0.6;
        context.drawImage(eleSakura, op_backAppear, op_coordi[23] - 30, 30, 30);
        context.globalAlpha = 1.0;
    }
    
    function outputOptions(Index, ques, moveon, selected, back) {
        var empha = false;
        if(moveon) empha = true;
        if(selected) {
            empha = true;
            context.drawImage(eleSakura, op_coordi[Index * 2] - 20, op_coordi[Index * 2 + 1] - 30, 50, 50);
        }
        if(ques) empha = true;
        if(empha) context.font = 53 + 'px Letter Gothic Std bord';
        else context.font = 47 + 'px Letter Gothic Std bord';
        if(back) {
            context.font = 30 + 'px Giddyup Std';
    
        }
        context.beginPath();
        context.fillStyle = 'rgb(5, 20, 27)';
        if(empha) context.fillText(op_selectTXT[Index], op_coordi[Index * 2] - op_selectTXT[Index].length * 3 / 2, op_coordi[Index * 2 + 1]);
        else context.fillText(op_selectTXT[Index], op_coordi[Index * 2], op_coordi[Index * 2 + 1] - 3);
        context.closePath();   
    }
    
    function updateOpPage(Index) {
        context.clearRect(0, 0, canvas.width, canvas.height);
        drawOpBack();
        for(var i=0; i<12; i++) {
            if(i === 0 || i === 3 || i === 7) {
                outputOptions(i, 1, 0, 0, 0);
            } else if(i === op_seleMusic || i === op_seleScale || i === op_seleDiff) {
                outputOptions(i, 0, 0, 1, 0);
            } else if(i === Index) {
                outputOptions(i, 0, 1, 0, 0);
            } else if(i === 11) {
                outputOptions(i, 0, 0, 0, 1);
            } else {
                outputOptions(i, 0, 0, 0, 0);
            }
        }
    }
    
    function drawOpPage() {
        /* draw Option background */
        context.clearRect(0, 0, canvas.width, canvas.height);
        drawOpBack();
        cancelAnimationFrame(timer);
        timer = requestAnimationFrame(animateOpScale);
    }
    /* ------------------ Help Page ---------------------*/
    
    var hp_scale = 1.0, hp_alpha = 1.0;
    var hp_backAppear = op_coordi[22] - 50, hp_back = true;
    
    function drawHpBack() { 
        context.clearRect(0, 0, canvas.width, canvas.height);
        context.globalAlpha = hp_alpha;
        context.drawImage(main_background, 0, 0, main_background.width, main_background.height, 0, canvas.height * (1.0 - hp_scale), canvas.width * hp_scale, canvas.height * hp_scale);
        context.globalAlpha = 1.0;
        context.font = 10 + 'px Arial';
        context.fillStyle = 'grey';
        context.fillText("All Copyright Reserved @2017 HazelNut", 400, 590);
    }
    
    function animateHpScale() {
        if(hp_scale < MAX_SIZE) {
            drawHpFrame();
            timer = requestAnimationFrame(animateHpScale);
        }else {
            drawHpBack();
            outputHelp();
            cancelAnimationFrame(timer); 
        }
    }
    
    function drawHpFrame() {
        hp_scale += cutStep;
        hp_alpha -= cutStep;
        drawHpBack();
    }
    
    function animateHpReturn() {
        if(hp_scale > 1.0) {
            hpReturnMain();
            timer = requestAnimationFrame(animateHpReturn);
        }else {
            updating = true;
            drawMainBack();
            for(var i=0; i<4; i++) {
                drawMainButton(i, 0.5, 150, 355);
            }
            cancelAnimationFrame(timer); 
        }
    }
    
    function hpReturnMain() {
        hp_scale -= cutStep;
        hp_alpha += cutStep;
        drawHpBack();
    }
    
    function animateHpSakura() {
        if(hp_backAppear < SakuraMax) {
            drawHpSakura();
            timer = requestAnimationFrame(animateHpSakura);
        }else {
            cancelAnimationFrame(timer);
        }
    }
    
    function drawHpSakura() {
        hp_backAppear += SakuraStep;
        context.globalAlpha = 0.6;
        drawHpBack();
        outputHelp();
        context.drawImage(eleSakura, hp_backAppear, op_coordi[23] - 30, 30, 30);
        context.globalAlpha = 1.0;
    }
    
    function outputHelp() {
        outputOptions(11, 0, 0, 0, 1);
        /* BackRect */
        context.fillStyle = 'white';
        context.globalAlpha = 0.3;
        context.moveTo(70, 110);
        context.arcTo(960, 110, 960, 530, 30);
        context.arcTo(960, 530, 40, 530, 30);
        context.arcTo(40, 530, 40, 110, 30);
        context.arcTo(40, 110, 960, 110, 30);
        context.fill();
        context.globalAlpha = 1.0;
        /* Title */
        context.font = 40 + 'px Zapfino';
        context.fillStyle = 'rgb(5, 20, 27)';
        context.fillText("Rules and Tips", 310, 80);
        /* Text */
        context.font = 20 + 'px Papyrus';
        context.fillText("Player and computer take turns to play the game, and you will always make the first move.", 130, 150);
        context.fillText("During a move a player selects one of the active grids. Then depending on the type of chesspiece in", 60, 180);
        context.fillText("that grid, one of the following actions take place:", 60, 210);
        context.fillText(""-": Magical waves radiate from the grid to the left and to the right along horizontal paths. All", 110, 250);
        context.fillText("grids on the path of the waves (including the selected grid too) become inactive. The waves", 110, 280);
        context.fillText("continue until the next inactive grid or to the edge of the chessboard if there are no inactive", 110, 310);
        context.fillText("grids on the way.", 110, 340);
        context.fillText(""|": Magical waves radiate upwards and downwards.", 110, 380);
        context.fillText(""+": Magical waves radiate in all four directions.", 110, 420);
        context.fillText("The player who cannot make a move (that is to say, all the grids on the chessboard are ", 130, 460);
        context.fillText("inactive) will be the loser of this game.", 60, 490);
    }
    
    function drawHpPage() {
        cancelAnimationFrame(timer);
        timer = timer = requestAnimationFrame(animateHpScale);
    }
    /* ------------------ About Page ---------------------*/
    
    var ab_scale = 1.0, ab_alpha = 1.0;
    var ab_backAppear = op_coordi[22] - 50, ab_back = true;
    
    function drawAbBack() {
        context.clearRect(0, 0, canvas.width, canvas.height);
        context.globalAlpha = ab_alpha;
        context.drawImage(main_background, 0, 0, main_background.width, main_background.height, canvas.width * (1.0 - ab_scale), canvas.height * (1.0 - ab_scale), canvas.width * ab_scale, canvas.height * ab_scale);
        context.globalAlpha = 1.0;
        context.font = 10 + 'px Arial';
        context.fillStyle = 'grey';
        context.fillText("All Copyright Reserved @2017 HazelNut", 400, 590);
    }
    
    function animateAbScale() {
        if(ab_scale < MAX_SIZE) {
            drawAbFrame();
            timer = requestAnimationFrame(animateAbScale);
        }else {
            drawAbBack();
            outputAbout();
            cancelAnimationFrame(timer); 
        }
    }
    
    function drawAbFrame() {
        ab_scale += cutStep;
        ab_alpha -= cutStep;
        drawAbBack();
    }
    
    function animateAbReturn() {
        if(ab_scale > 1.0) {
            abReturnMain();
            timer = requestAnimationFrame(animateAbReturn);
        }else {
            updating = true;
            drawMainBack();
            for(var i=0; i<4; i++) {
                drawMainButton(i, 0.5, 150, 355);
            }
            cancelAnimationFrame(timer); 
        }
    }
    
    function abReturnMain() {
        ab_scale -= cutStep;
        ab_alpha += cutStep;
        drawAbBack();
    }
    
    function animateAbSakura() {
        if(ab_backAppear < SakuraMax) {
            drawAbSakura();
            timer = requestAnimationFrame(animateAbSakura);
        }else {
            cancelAnimationFrame(timer);
        }
    }
    
    function drawAbSakura() {
        ab_backAppear += SakuraStep;
        context.globalAlpha = 0.6;
        drawAbBack();
        outputAbout();
        context.drawImage(eleSakura, ab_backAppear, op_coordi[23] - 30, 30, 30);
        context.globalAlpha = 1.0;
    }
    
    function outputAbout() {
        outputOptions(11, 0, 0, 0, 1);
        /* BackRect */
        context.fillStyle = 'white';
        context.globalAlpha = 0.3;
        context.moveTo(70, 110);
        context.arcTo(960, 110, 960, 530, 30);
        context.arcTo(960, 530, 40, 530, 30);
        context.arcTo(40, 530, 40, 110, 30);
        context.arcTo(40, 110, 960, 110, 30);
        context.fill();
        context.globalAlpha = 1.0;
        /* Title */
        context.font = 40 + 'px Zapfino';
        context.fillStyle = 'rgb(5, 20, 27)';
        context.fillText("About the Game", 310, 80);
        /* Text */
        context.font = 20 + 'px Papyrus';
        context.fillText("The Touhou Project is a series of Japanese bullet hell shooter video games developed by the", 100, 150);
        context.fillText("single-person Team Shanghai Alice.", 60, 180);
        context.fillStyle = 'rgb(10, 100, 95)';
        context.fillText("[Professional interpretation]", 380, 180);
        context.fillStyle = 'rgb(5, 20, 27)';
        context.fillText("I used the background of this game and combined it with a new chess rule to create my own", 100, 220);
        context.fillText("game. It's an indie game made by me alone, as its structure and materials are all conceived and made", 60, 250);
        context.fillText("by myself. I hope that you will enjoy it.", 60, 280);
        context.fillText("If you want to get more Information about Touhou:", 60, 320);
        context.fillStyle = 'rgb(10, 100, 95)';
        context.fillText("http://thwiki.cc", 100, 350);
        context.fillStyle = 'rgb(5, 20, 27)';
        context.fillText("Progress of coding has been posted on my own blog:", 60, 380);
        context.fillStyle = 'rgb(10, 100, 95)';
        context.fillText("http://www.cnblogs.com/HazelNut/", 100, 410);
        context.fillStyle = 'rgb(5, 20, 27)';
        context.fillText("If you want to send me an Email: shiraihazel@163.com", 60, 440);
    }
    
    function drawAbPage() {
        cancelAnimationFrame(timer);
        timer = requestAnimationFrame(animateAbScale);
    }
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  • 原文地址:https://www.cnblogs.com/HazelNut/p/8088902.html
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