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rms.js
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rms.js
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//Create New Canvas
function get_new_canvas(_id, _className, _width, _height, _zIndex, _position,
_border, _visibility, _opacity) {
let newCanvas = document.createElement('canvas');
newCanvas.id = _id;
newCanvas.className = _className;
newCanvas.width = _width;
newCanvas.height = _height;
newCanvas.style.zIndex = _zIndex;
newCanvas.style.position = _position;
newCanvas.style.border = _border;
newCanvas.style.visibility = _visibility;
newCanvas.style.opacity = _opacity;
return newCanvas
}
//Draw Fixation On Fixation Canvas
function CreateFixationContext(_id, _fillStyle, _frameWidth, _fixationWidth,
_frameHeight, _fixationHeight, _fixation) {
let fixCtx = _fixation.getContext(_id);
fixCtx.fillStyle = _fillStyle;
fixCtx.fillRect(
(_frameWidth - _fixationWidth) / 2,
(_frameHeight - _fixationHeight) / 2,
_fixationWidth, _fixationHeight);
fixCtx.fillRect(
(_frameWidth - _fixationHeight) / 2,
(_frameHeight - _fixationWidth) / 2,
_fixationHeight, _fixationWidth);
}
//Get all rectangle ranges
function GetRectanglesRange(_rectangle_Width, _rectangle_height, _frameWidth, _frameHeight) {
return [-_rectangle_Width, -_rectangle_height,
_frameWidth + _rectangle_Width,
_frameHeight + _rectangle_height];
}
///Create Mondrian Canvas
function CreateMondrian(_id, _className, _width, _height, _zIndex, _position,
_border, _opacity) {
let mondrian = document.createElement('canvas');
mondrian.id = _id;
mondrian.className = _className;
mondrian.width = _width;
mondrian.height = _height;
mondrian.style.zIndex = _zIndex;
mondrian.style.position = _position;
mondrian.style.border = _border;
mondrian.style.opacity = _opacity;
return mondrian;
}
//Draw Mondrian
function CreateMondrianContext(_id, _mondrian, _fillStyle, _x, _y, _frameWidth,
_frameHeight) {
let ctx = _mondrian.getContext(_id);
ctx.fillStyle = _fillStyle;
ctx.fillRect(_x, _y, _frameWidth, _frameHeight);
return ctx;
}
//Fill Mondrian
function FillRectangles(_rectNum, _mondrianContext, _colors, _rectangle_Width,
_rectangle_Height,
_frameWidth, _frameHeight) {
const rectRange = GetRectanglesRange(_rectangle_Width, _rectangle_Height, _frameWidth,
_frameHeight);
for (let j = 0; j < _rectNum; j++) {
_mondrianContext.fillStyle = _colors[Math.floor(Math.random() * _colors.length)];
_mondrianContext.fillRect(Math.round(Math.random() *
(rectRange[2] - rectRange[0]) + rectRange[0]),
Math.round(Math.random() * (rectRange[3] - rectRange[1]) + rectRange[1]),
_rectangle_Width + Math.round(Math.random()) * _rectangle_Width,
_rectangle_Height + Math.round(Math.random()) * _rectangle_Height);
}
}
function GetMondrianProfiles(max_flips) {
return [
[0, 1, stringSafe(4 / max_flips),
1, stringSafe(4 / max_flips + 0.00001), 0]
];
}
function CreateMondrianProfiles(max_flips, fade_out_flip, regularFlip, mondrian_max_opacity, Hz,
fade_out_time, mondrian_count) {
let x, x2;
// Auxiliary variables
let mondrian_profiles = GetMondrianProfiles(max_flips);
x = stringSafe(6 / regularFlip);
x2 = stringSafe(10 / regularFlip);
for (let i = 6; i < regularFlip; i += 6) {
x = stringSafe(i / max_flips);
x2 = stringSafe((i + 4) / max_flips);
let thisAlpha = 1;
// Add zero if needed
if (mondrian_profiles.length - 1 < (i / 6) % mondrian_count) {
mondrian_profiles.push([0, 0])
}
// Push locations and values
mondrian_profiles[(i / 6) % mondrian_count].push(stringSafe(x - 0.00001), 0, x,
thisAlpha, x2, thisAlpha, stringSafe(x2 + 0.00001), 0);
}
for (let i = 6; i < fade_out_flip; i += 6) {
// Compute locations
x = stringSafe(i / fade_out_flip);
x2 = stringSafe((i + 4) / fade_out_flip);
let thisAlpha = Math.min(mondrian_max_opacity, (fade_out_flip - i - 1) / fade_out_flip);
// Add zero if needed
if (mondrian_profiles.length - 1 < (i / 6) % mondrian_count) {
mondrian_profiles.push([0, 0])
}
// Push locations and values
mondrian_profiles[(i / 6) % mondrian_count].push(stringSafe(x - 0.00001), 0, x,
thisAlpha, x2, thisAlpha, stringSafe(x2 + 0.00001), 0);
}
return mondrian_profiles;
}
//Draw stimulus
function CreateStimulusContext(_id, stimulus, stimulus_vertical_flip, frameWidth, frameHeight, stimulus_width,
stimulus_height, stimulus_side, trial_stimulus, start_trial, stimulus_delay,
start_compute, fixationWidth) {
let stimulus_canvas = document.getElementById("stimulus");
let stimulus_context = stimulus_canvas.getContext(_id);
if (stimulus_vertical_flip) {
stimulus_context.translate(0, frameHeight);
stimulus_context.scale(1, -1);
}
let stimulus_location;
if (stimulus_side === 0) {
stimulus_location = (3 * frameWidth / 4) - (frameHeight / 2);
} else if (stimulus_side === 1) {
stimulus_location = (frameWidth / 4) - (frameHeight / 2);
} else if (stimulus_side === 2) {
stimulus_location = 0;
} else if (stimulus_side === 3) {
stimulus_location = (frameHeight / 2) + (fixationWidth / 2) + 5;
// stimulus_location = -1 * stimulus_location;
}
let img = new Image();
img.id = 'stimulusImg';
console.log(trial_stimulus);
img.src = trial_stimulus;
img.onload = function () {
if (stimulus_side > 1) {
stimulus_context.drawImage(img, 0, stimulus_location,
stimulus_width, stimulus_height);
} else {
stimulus_context.drawImage(img, stimulus_location, 0,
stimulus_width, stimulus_height);
}
setTimeout(start_trial, 1000 * stimulus_delay - (Date.now() - start_compute));
};
}
function get_random_int(min, max) {
min = Math.ceil(min);
max = Math.floor(max);
return Math.floor(Math.random() * (max - min)) + min;
//The maximum is exclusive and the minimum is inclusive
}
//Get Stimulus side
function get_stimulus_side(trial_stimulus_side, orientation = 'h') {
if (trial_stimulus_side >= 0) {
return trial_stimulus_side
} else {
let max_int = 2;
let min_int = 0;
if ((orientation === 'v') || (orientation === 'b')) {
max_int = 4;
if (orientation === 'v') {
min_int = 2;
}
}
return get_random_int(min_int, max_int);
}
}
function stringSafe(n) {
return (n < 0.00001 && n > -0.00001) ? 0 : n;
} // Makes sure no too small values mess up the SVG animation path