var gColorPalette = [];
var gStartTime = 0;
+var gCurrentImageData;
+var gLastImageData;
+
+function Startup() {
+ var img = document.getElementById("mbrotImage");
+ img.addEventListener("mouseup", imgEvHandler, false);
+ img.addEventListener("mousedown", imgEvHandler, false);
+ img.addEventListener("mousemove", imgEvHandler, false);
+ img.addEventListener("touchstart", imgEvHandler, false);
+ img.addEventListener("touchend", imgEvHandler, false);
+ img.addEventListener("touchcancel", imgEvHandler, false);
+ img.addEventListener("touchleave", imgEvHandler, false);
+ img.addEventListener("touchmove", imgEvHandler, false);
+}
+
+function getAdjustVal(aName) {
+ var value;
+ switch (aName) {
+ case "image.width":
+ case "image.height":
+ value = 0;
+ try {
+ value = document.getElementById(aName.replace(".", "_")).value;
+ }
+ catch (e) { }
+ if ((value < 10) || (value > 5000)) {
+ value = 300;
+ //document.getElementById(aName.replace(".", "_")).value = value;
+ }
+ return value;
+ case "last_image.Cr_*":
+ var Cr_min = -2.0;
+ var Cr_max = 1.0;
+ try {
+ Cr_min = parseFloat(document.getElementById("Cr_min").value);
+ Cr_max = parseFloat(document.getElementById("Cr_max").value);
+ }
+ catch (e) { }
+ if ((Cr_min < -3) || (Cr_min > 2) ||
+ (Cr_max < -3) || (Cr_max > 2) || (Cr_min >= Cr_max)) {
+ Cr_min = -2.0; Cr_max = 1.0;
+ }
+ document.getElementById("Cr_min").value = Cr_min;
+ document.getElementById("Cr_max").value = Cr_max;
+ return {Cr_min: Cr_min, Cr_max: Cr_max};
+ case "last_image.Ci_*":
+ var Ci_min = -1.5;
+ var Ci_max = 1.5;
+ try {
+ Ci_min = parseFloat(document.getElementById("Ci_min").value);
+ Ci_max = parseFloat(document.getElementById("Ci_max").value);
+ }
+ catch (e) { }
+ if ((Ci_min < -2.5) || (Ci_min > 2.5) ||
+ (Ci_max < -2.5) || (Ci_max > 2.5) || (Ci_min >= Ci_max)) {
+ Ci_min = -1.5; Ci_max = 1.5;
+ }
+ document.getElementById("Ci_min").value = Ci_min;
+ document.getElementById("Ci_max").value = Ci_max;
+ return {Ci_min: Ci_min, Ci_max: Ci_max};
+ case "iteration_max":
+ value = 500;
+ try {
+ value = document.getElementById("iterMax").value;
+ }
+ catch (e) {
+ setIter(value);
+ }
+ if (value < 10 || value > 10000) {
+ value = 500;
+ setIter(value);
+ }
+ return value;
+ case "use_algorithm":
+ value = "numeric";
+ try {
+ value = document.getElementById("algorithm").value;
+ }
+ catch (e) {
+ setAlgorithm(value);
+ }
+ return value;
+ case "color_palette":
+ value = "kairo";
+ try {
+ value = document.getElementById("palette").value;
+ }
+ catch(e) {
+ setPalette(value);
+ }
+ return value;
+ case "syncProportions":
+ value = true;
+ try {
+ value = document.getElementById("proportional").value;
+ }
+ catch(e) {
+ document.getElementById("proportional").value = value;
+ }
+ return value;
+ default:
+ return false;
+ }
+}
+
+function setVal(aName, aValue) {
+ switch (aName) {
+ case "image.width":
+ case "image.height":
+ document.getElementById(aName.replace(".", "_")).value = value;
+ break;
+ case "last_image.Cr_*":
+ document.getElementById("Cr_min").value = aValue.Cr_min;
+ document.getElementById("Cr_max").value = aValue.Cr_max;
+ break;
+ case "last_image.Ci_*":
+ document.getElementById("Ci_min").value = aValue.Ci_min;
+ document.getElementById("Ci_max").value = aValue.Ci_max;
+ break;
+ case "iteration_max":
+ setIter(aValue);
+ break;
+ case "use_algorithm":
+ setAlgorithm(aValue);
+ break;
+ case "color_palette":
+ setPalette(valueaValue);
+ break;
+ case "syncProportions":
+ document.getElementById("proportional").value = aValue;
+ break;
+ }
+}
+
+function adjustCoordsAndDraw(aC_min, aC_max) {
+ var iWidth = getAdjustVal("image.width");
+ var iHeight = getAdjustVal("image.height");
+
+ // correct coordinates
+ if (aC_min.r < -2)
+ aC_min.r = -2;
+ if (aC_max.r > 2)
+ aC_max.r = 2;
+ if ((aC_min.r > 2) || (aC_max.r < -2) || (aC_min.r >= aC_max.r)) {
+ aC_min.r = -2.0; aC_max.r = 1.0;
+ }
+ if (aC_min.i < -2)
+ aC_min.i = -2;
+ if (aC_max.i > 2)
+ aC_max.i = 2;
+ if ((aC_min.i > 2) || (aC_max.i < -2) || (aC_min.i >= aC_max.i)) {
+ aC_min.i = -1.3; aC_max.i = 1.3;
+ }
+
+ var CWidth = aC_max.r - aC_min.r;
+ var CHeight = aC_max.i - aC_min.i;
+ var C_mid = new complex(aC_min.r + CWidth / 2, aC_min.i + CHeight / 2);
+
+ var CRatio = Math.max(CWidth / iWidth, CHeight / iHeight);
+
+ setVal("last_image.Cr_*", {Cr_min: C_mid.r - iWidth * CRatio / 2,
+ Cr_max: C_mid.r + iWidth * CRatio / 2});
+ setVal("last_image.Ci_*", {Ci_min: C_mid.i - iHeight * CRatio / 2,
+ Ci_max: C_mid.i + iHeight * CRatio / 2});
+
+ drawImage();
+}
function drawImage() {
var canvas = document.getElementById("mbrotImage");
document.getElementById("calcTime").textContent = "--";
+ if (gCurrentImageData) {
+ gLastImageData = gCurrentImageData;
+ }
+
gColorPalette = getColorPalette(document.getElementById("palette").value);
- var Cr_min = -2.0;
- var Cr_max = 1.0;
- try {
- Cr_min = parseFloat(document.getElementById("Cr_min").value);
- Cr_max = parseFloat(document.getElementById("Cr_max").value);
- }
- catch (e) { }
- if ((Cr_min < -2) || (Cr_min > 2) ||
- (Cr_max < -2) || (Cr_max > 2) || (Cr_min >= Cr_max)) {
- Cr_min = -2.0; Cr_max = 1.0;
- }
- document.getElementById("Cr_min").value = Cr_min;
- document.getElementById("Cr_max").value = Cr_max;
-
- var Ci_min = -1.5;
- var Ci_max = 1.5;
- try {
- Ci_min = parseFloat(document.getElementById("Ci_min").value);
- Ci_max = parseFloat(document.getElementById("Ci_max").value);
- }
- catch (e) { }
- if ((Ci_min < -2) || (Ci_min > 2) ||
- (Ci_max < -2) || (Ci_max > 2) || (Ci_min >= Ci_max)) {
- Ci_min = -1.5; Ci_max = 1.5;
- }
- document.getElementById("Ci_min").value = Ci_min;
- document.getElementById("Ci_max").value = Ci_max;
+ var Cr_vals = getAdjustVal("last_image.Cr_*");
+ var Cr_min = Cr_vals.Cr_min;
+ var Cr_max = Cr_vals.Cr_max;
- //var algorithm = gPref.getCharPref("mandelbrot.use_algorithm");
- var iterMax = parseInt(document.getElementById("iterMax").value);
- var algorithm = "numeric"; //"oo"
+ var Ci_vals = getAdjustVal("last_image.Ci_*");
+ var Ci_min = Ci_vals.Ci_min;
+ var Ci_max = Ci_vals.Ci_max;
+
+ var iterMax = getAdjustVal("iteration_max");
+ var algorithm = getAdjustVal("use_algorithm");
var iWidth = canvas.width;
if ((iWidth < 10) || (iWidth > 5000)) {
canvas.height = iHeight;
}
+ gCurrentImageData = {
+ C_min: new complex(Cr_min, Ci_min),
+ C_max: new complex(Cr_max, Ci_max),
+ iWidth: iWidth,
+ iHeight: iHeight,
+ iterMax: iterMax
+ };
+
context.fillStyle = "rgba(255, 255, 255, 127)";
context.fillRect(0, 0, canvas.width, canvas.height);
}
palette[1024] = [0, 0, 0, 255];
break;
+ case 'rainbow-squared1':
+ for (var i = 0; i < 34; i++) {
+ var cc = Math.floor(i * 255 / 33);
+ palette[i] = [cc, 0, 0, 255];
+ }
+ for (var i = 0; i < 137; i++) {
+ var cc = Math.floor(i * 255 / 136);
+ palette[34 + i] = [255, cc, 0, 255];
+ }
+ for (var i = 0; i < 307; i++) {
+ var cc = Math.floor(i * 255 / 306);
+ palette[171 + i] = [255 - cc, 255, cc, 255];
+ }
+ for (var i = 0; i < 546; i++) {
+ var cc = Math.floor(i * 255 / 545);
+ palette[478 + i] = [cc, 255 - cc, 255, 255];
+ }
+ palette[1024] = [0, 0, 0, 255];
+ break;
+ case 'rainbow-linear2':
+ for (var i = 0; i < 205; i++) {
+ var cc = Math.floor(i * 255 / 204);
+ palette[i] = [255, cc, 0, 255];
+ palette[204 + i] = [255 - cc, 255, 0, 255];
+ palette[409 + i] = [0, 255, cc, 255];
+ palette[614 + i] = [0, 255 - cc, 255, 255];
+ palette[819 + i] = [cc, 0, 255, 255];
+ }
+ palette[1024] = [0, 0, 0, 255];
+ break;
+ case 'rainbow-squared2':
+ for (var i = 0; i < 19; i++) {
+ var cc = Math.floor(i * 255 / 18);
+ palette[i] = [255, cc, 0, 255];
+ }
+ for (var i = 0; i < 74; i++) {
+ var cc = Math.floor(i * 255 / 73);
+ palette[19 + i] = [255 - cc, 255, 0, 255];
+ }
+ for (var i = 0; i < 168; i++) {
+ var cc = Math.floor(i * 255 / 167);
+ palette[93 + i] = [0, 255, cc, 255];
+ }
+ for (var i = 0; i < 298; i++) {
+ var cc = Math.floor(i * 255 / 297);
+ palette[261 + i] = [0, 255 - cc, 255, 255];
+ }
+ for (var i = 0; i < 465; i++) {
+ var cc = Math.floor(i * 255 / 464);
+ palette[559 + i] = [cc, 0, 255, 255];
+ }
+ palette[1024] = [0, 0, 0, 255];
+ break;
}
return palette;
}
// ########## UI functions ##########
+var zoomstart;
+var imgBackup;
+var zoomTouchID;
+
+var imgEvHandler = {
+ handleEvent: function(aEvent) {
+ var canvas = document.getElementById("mbrotImage");
+ var context = canvas.getContext("2d");
+ var touchEvent = aEvent.type.indexOf('touch') != -1;
+
+ // Bail out if this is neither a touch nor left-click.
+ if (!touchEvent && aEvent.button != 0)
+ return;
+
+ // Bail out if the started touch can't be found.
+ if (touchEvent && zoomstart &&
+ !aEvent.changedTouches.identifiedTouch(zoomTouchID))
+ return;
+
+ var coordObj = touchEvent ?
+ aEvent.changedTouches.identifiedTouch(zoomTouchID) :
+ aEvent;
+
+ switch (aEvent.type) {
+ case 'mousedown':
+ case 'touchstart':
+ if (touchEvent) {
+ zoomTouchID = aEvent.changedTouches.item(0).identifier;
+ coordObj = aEvent.changedTouches.identifiedTouch(zoomTouchID);
+ }
+ // left button - start dragzoom
+ zoomstart = {x: coordObj.clientX - canvas.offsetLeft,
+ y: coordObj.clientY - canvas.offsetTop};
+ imgBackup = context.getImageData(0, 0, canvas.width, canvas.height);
+ break;
+ case 'mouseup':
+ case 'touchend':
+ if (zoomstart) {
+ context.putImageData(imgBackup, 0, 0);
+ var zoomend = {x: coordObj.clientX - canvas.offsetLeft,
+ y: coordObj.clientY - canvas.offsetTop};
+
+ // make sure zoomend is bigger than zoomstart
+ if ((zoomend.x == zoomstart.x) || (zoomend.y == zoomstart.y)) {
+ // cannot zoom what has no area, discard it
+ zoomstart = undefined;
+ return;
+ }
+ if (zoomend.x < zoomstart.x)
+ [zoomend.x, zoomstart.x] = [zoomstart.x, zoomend.x];
+ if (zoomend.y < zoomstart.y)
+ [zoomend.y, zoomstart.y] = [zoomstart.y, zoomend.y];
+
+ // determine new "coordinates"
+ var CWidth = gCurrentImageData.C_max.r - gCurrentImageData.C_min.r;
+ var CHeight = gCurrentImageData.C_max.i - gCurrentImageData.C_min.i;
+ var newC_min = new complex(
+ gCurrentImageData.C_min.r + zoomstart.x / gCurrentImageData.iWidth * CWidth,
+ gCurrentImageData.C_min.i + zoomstart.y / gCurrentImageData.iHeight * CHeight);
+ var newC_max = new complex(
+ gCurrentImageData.C_min.r + zoomend.x / gCurrentImageData.iWidth * CWidth,
+ gCurrentImageData.C_min.i + zoomend.y / gCurrentImageData.iHeight * CHeight);
+
+ adjustCoordsAndDraw(newC_min, newC_max);
+ }
+ zoomstart = undefined;
+ break;
+ case 'mousemove':
+ case 'touchmove':
+ if (zoomstart) {
+ context.putImageData(imgBackup, 0, 0);
+ context.strokeStyle = "rgb(255,255,31)";
+ context.strokeRect(zoomstart.x, zoomstart.y,
+ coordObj.clientX - canvas.offsetLeft - zoomstart.x,
+ coordObj.clientY - canvas.offsetTop - zoomstart.y);
+ }
+ break;
+ }
+ }
+};
+
function toggleSettings() {
var fs = document.getElementById("settings");
if (fs.style.display != "block") {
else {
fs.style.display = "none";
}
-}
\ No newline at end of file
+}
+
+function goBack() {
+ if (gLastImageData) {
+ document.getElementById("iterMax").value = gLastImageData.iterMax;
+ // use gLastImageData.iWidth, gLastImageData.iHeight ???
+ adjustCoordsAndDraw(gLastImageData.C_min, gLastImageData.C_max);
+ gLastImageData = undefined;
+ }
+}
+
+function setIter(aIter) {
+ document.getElementById("iterMax").value = aIter;
+}
+
+function setPalette(aPaletteID) {
+ document.getElementById("palette").value = aPaletteID;
+ gColorPalette = getColorPalette(aPaletteID);
+}
+
+function setAlgorithm(algoID) {
+ //document.getElementById("algorithm").value = algoID;
+}
projects / mandelbrot-web.git / commitdiff