Quillot Mathias / triangle

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  <html>
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  <head>
      <meta charset="UTF-8">
      <title>Konva's test</title>
      <script src="https://unpkg.com/konva@3.3.2/konva.min.js"></script>
      <script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
  </head>
  
  <body>
      <h1>Interface Mockup with Konda JS</h1>
      <div id="container"></div>
      <button onclick="eventNext()">Valider</button>
      <div id="information" style="display:none">
          <img src="image.png" id="image-char" width="150px" />
          <audio controls id="audio-player-char">
              <source src="" type="audio/wav">
              Your browser does not support the audio element.
          </audio>
      </div>
  
      <script type="text/javascript">
  
          // -- FUNCTIONS -- 
          /**
           * Check if an intersection exists between AB and CD. 
           * Return : 
           *  - false if it has no intersection
           *  - true otherwise 
           */
          function isThereIntersection(A, B, C, D) {
              a = A.x; b = A.y; c = B.x; d = B.y
              p = C.x; q = C.y; r = D.x; s = D.y
              var det, gamma, lambda;
              det = (c - a) * (s - q) - (r - p) * (d - b);
              if (det === 0) {
                  return false;
              } else {
                  lambda = ((s - q) * (r - a) + (p - r) * (s - b)) / det;
                  gamma = ((b - d) * (r - a) + (c - a) * (s - b)) / det;
                  return (0 < lambda && lambda < 1) && (0 < gamma && gamma < 1)
              }
          };
  
          /**
           * Compute intersection between two lines
           * Please, check if an intersection exists between
           * calling this function. (ref isThereIntersection)
           * 
           * Return:
           * - Intersection point between two lines
           */
          function intersection(A, B, C, D) {
              a = A.x; b = A.y; c = B.x; d = B.y
              p = C.x; q = C.y; r = D.x; s = D.y
  
              l1_a = (B.y - A.y) / (B.x - A.x);
              l1_b = A.y - l1_a * A.x;
              l2_a = (D.y - C.y) / (D.x - C.x);
              l2_b = C.y - l2_a * C.x;
  
              // Compute intersection point
              x = (l2_b - l1_b) / (l1_a - l2_a)
              y = l1_a * x + l1_b
              return {
                  x: x,
                  y: y
              }
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          }
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          /**
           * Return the index of the closest point
           * 
           */
          function closestPoint(ref, points) {
              var dist = 100000;
              var closest_i = -1;
              for (var i in points) {
                  cur = Math.sqrt(Math.pow(ref.x - points[i].x, 2) + Math.pow(ref.y - points[i].y, 2));
                  if (cur < dist) {
                      dist = cur;
                      closest_i = i;
                  }
              }
              return closest_i;
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          }
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          currentId = 0
          // -- EVENTS --
          function eventInformationRef(id) {
              $("#information").css("display", "block");
              $("#information #image-char").attr("src", data["refs"][currentId][id]["image"])
              $("#information #audio-player-char source").attr("src", data["refs"][currentId][id]["audio"])
              $("#information #audio-player-char")[0].load();
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          }
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          function eventNext() {
              console.log("test")
              $("#information").css("display", "none");
              currentId++;
              ref1Obj.src = data["refs"][currentId]["1"]["image"]
              ref2Obj.src = data["refs"][currentId]["2"]["image"]
              ref3Obj.src = data["refs"][currentId]["3"]["image"]
          }
  
  
          // -- DATA --
          data = {
              triangle: {
                  A: {
                      x: 170,
                      y: 80
                  },
                  B: {
                      x: 365,
                      y: 125
                  },
                  C: {
                      x: 215,
                      y: 260
                  }
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              },
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              refs:
                  [
                      {
                          1: {
                              "image": "https://pixel.nymag.com/imgs/daily/vulture/2017/11/01/01-thor-ragnarok.w700.h700.jpg",
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                              "audio": "data/fr-fr,global_admiral_koris,gth002_bigchoice_m,00506414_m.wav"
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                          },
                          2: {
                              "image": "https://vignette.wikia.nocookie.net/lotr/images/e/e7/Gandalf_the_Grey.jpg/revision/latest?cb=20121110131754",
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                              "audio": "data/fr-fr,global_illusive_man,cat004_premech_log_kleng_d,00636312_m.wav"
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                          },
                          3: {
                              "image": "https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTpZXULP94DEy5J5gyfRx3MPNZYU6QeHHaHkzrcrUpyr_eoeLE0Rw",
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                              "audio": "data/fr-fr,global_joker,nor_joker_bridge_d,00648244_m.wav"
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                          }
                      },
                      {
                          1: {
                              "image": "https://upload.wikimedia.org/wikipedia/en/7/77/EricCartman.png",
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                              "audio": "data/fr-fr,global_oldcouncil_turian,procit_turian_request_m,00618678_m.wav"
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                          },
                          2: {
                              "image": "https://images-na.ssl-images-amazon.com/images/I/513jWqHJZDL._SY355_.jpg",
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                              "audio": "data/fr-fr,global_thane,citprs_hosp_thane_d,00638983_m.wav"
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                          },
                          3: {
                              "image": "https://tous-les-heros.com/modules/mdg_blog/views/img/front/1779/visuel-article_article_offredumoment_actualitedesheros.jpg",
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                              "audio": "data/fr-fr,global_wreav,kro002_truck_talk1_m,00595765_m.wav"
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                          }
                      },
                      {
                          1: {
                              "image": "https://the-big-bang-theory.com/images/uploads/5/rs_3463ec66edb459bd1dd.jpg",
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                              "audio": "data/fr-fr,global_zaeed,citprs_zaeed_a,00674049_m.wav"
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                          },
                          2: {
                              "image": "https://the-big-bang-theory.com/images/uploads/2/rs_35619e852e696869058.jpg",
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                              "audio": "data/fr-fr,hench_ashley,cermir_observation_enter_b,00635714_m.wav"
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                          },
                          3: {
                              "image": "https://wwwimage-secure.cbsstatic.com/thumbnails/photos/w425/cast/cast_bigbang_johnnygalecki.jpg",
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                              "audio": "data/fr-fr,hench_ashley,norcat_cat4_romculm_ash_m,00652553_m.wav"
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                          }
                      }
                  ]
          }
  
          // -- Help functions --
          function writeMessage(message) {
              text.text(message);
              layer.draw();
          }
  
          // -- STAGE & LAYER--
          var stage = new Konva.Stage({
              container: 'container',   // id of container <div>
              width: 500,
              height: 500
          });
  
          var layer = new Konva.Layer();
  
          // -- TEXT --
          var text = new Konva.Text({
              x: 10,
              y: 10,
              fontFamily: 'Calibri',
              fontSize: 24,
              text: 'Test',
              fill: 'black'
          });
  
  
          // -- RECTANGLE --
          // TODO: Ajouter un rectangle en fond qui serve à 
          // gérer l'événement de la souris.
  
          var rect = new Konva.Rect({
              x: 0,
              y: 0,
              width: stage.attrs.width,
              height: stage.attrs.height,
              stroke: 'black',
              strokeWidth: 0
          });
  
  
          // -- TRIANGLE --
          var triangle = new Konva.Shape({
              stroke: 'black',
              fill: '#00D2FF',
              strokeWidth: 1,
              sceneFunc: function (context) {
                  context.beginPath();
                  context.moveTo(data.triangle.A.x, data.triangle.A.y);
                  context.lineTo(data.triangle.B.x, data.triangle.B.y);
                  context.lineTo(data.triangle.C.x, data.triangle.C.y);
                  context.closePath();
                  context.fillStrokeShape(this); 50
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              }
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          });
  
          bar = {
              x: (data.triangle.A.x + data.triangle.B.x + data.triangle.C.x) / 3,
              y: (data.triangle.A.y + data.triangle.B.y + data.triangle.C.y) / 3
          }
  
  
          triangle.on("mousemove mousedown", function (event) {
              if (event.evt.buttons === 1) {
                  var mousePos = stage.getPointerPosition();
                  var x = mousePos.x;
                  var y = mousePos.y;
                  point.position({ x: x, y: y });
                  layer.draw();
              }
          })
  
          function eventOutTriangle(event) {
              if (event.evt.buttons === 1) {
                  var mousePos = stage.getPointerPosition();
                  var pointout = {
                      x: mousePos.x,
                      y: mousePos.y
                  }
                  var lines_to_test = [
                      {
                          A: data.triangle.A,
                          B: data.triangle.B
                      },
                      {
                          A: data.triangle.B,
                          B: data.triangle.C
                      },
                      {
                          A: data.triangle.C,
                          B: data.triangle.A
                      }
                  ]
  
                  var intersections = []
                  for (var ind in lines_to_test) {
                      line = lines_to_test[ind];
                      var inter = isThereIntersection(
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                          line.A, line.B,
                          bar, pointout
                      )
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                      if (inter !== false) {
                          intersections.push(
                              intersection(
                                  line.A, line.B,
                                  bar, pointout
                              )
                          );
                      }
                  }
                  i = closestPoint(pointout, intersections);
                  point.position({
                      x: intersections[i].x,
                      y: intersections[i].y
                  });
                  layer.draw();
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              }
          }
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          rect.on("mousemove", function (event) {
              eventOutTriangle(event);
          })
  
          // -- POINT --
          // create our shape
          var point = new Konva.Circle({
              x: bar.x,
              y: bar.y,
              radius: 5,
              fill: 'red',
              stroke: 'black',
              strokeWidth: 1
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          });
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          point.listening(false);
  
  
          // -- IMAGE REFS --
          // 1rst ref
          var ref1Obj = new Image();
          ref1Obj.onload = function () {
              var ref1 = new Konva.Image({
                  x: 50,
                  y: 50,
                  image: ref1Obj,
                  width: 100,
                  height: 100
              });
  
              ref1.on("mousemove", function (event) {
                  eventOutTriangle(event);
              });
  
              ref1.on("click", function (event) {
                  eventInformationRef(1);
              });
              layer.add(ref1);
              layer.draw();
          }
          ref1Obj.src = data["refs"][currentId]["1"]["image"];
  
          // 2nd ref
          var ref2Obj = new Image();
          ref2Obj.onload = function () {
              var ref2 = new Konva.Image({
                  x: 150,
                  y: 300,
                  image: ref2Obj,
                  width: 100,
                  height: 100
              });
  
              ref2.on("click", function (event) {
                  eventInformationRef(2);
              })
  
              ref2.on("mousemove", function (event) {
                  eventOutTriangle(event);
              });
  
              layer.add(ref2);
              layer.draw();
          }
          ref2Obj.src = data["refs"][currentId]["2"]["image"];
  
  
          // 3rd ref
          var ref3Obj = new Image();
          ref3Obj.onload = function () {
              var ref3 = new Konva.Image({
                  x: 390,
                  y: 50,
                  image: ref3Obj,
                  width: 100,
                  height: 100
              });
  
              ref3.on("click", function (event) {
                  eventInformationRef(3);
              })
              ref3.on("mousemove", function (event) {
                  eventOutTriangle(event);
              });
  
              layer.add(ref3);
              layer.draw();
          }
          ref3Obj.src = data["refs"][currentId]["3"]["image"];
  
  
          // -- ADDING
          // add the shape to the layer
          layer.add(rect);
          layer.add(triangle);
          layer.add(point);
          layer.add(text);
  
  
          // add the layer to the stage
          stage.add(layer);
  
  
          // -- DRAWING
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          layer.draw();
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      </script>
  
  </body>
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  </html>