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import clipAntimeridian from "../clip/antimeridian.js";
import clipCircle from "../clip/circle.js";
import clipRectangle from "../clip/rectangle.js";
import compose from "../compose.js";
import identity from "../identity.js";
import {cos, degrees, radians, sin, sqrt} from "../math.js";
import {rotateRadians} from "../rotation.js";
import {transformer} from "../transform.js";
import {fitExtent, fitSize, fitWidth, fitHeight} from "./fit.js";
import resample from "./resample.js";
var transformRadians = transformer({
point: function(x, y) {
this.stream.point(x * radians, y * radians);
}
});
function transformRotate(rotate) {
return transformer({
point: function(x, y) {
var r = rotate(x, y);
return this.stream.point(r[0], r[1]);
}
});
}
function scaleTranslate(k, dx, dy) {
function transform(x, y) {
return [dx + k * x, dy - k * y];
}
transform.invert = function(x, y) {
return [(x - dx) / k, (dy - y) / k];
};
return transform;
}
function scaleTranslateRotate(k, dx, dy, alpha) {
var cosAlpha = cos(alpha),
sinAlpha = sin(alpha),
a = cosAlpha * k,
b = sinAlpha * k,
ai = cosAlpha / k,
bi = sinAlpha / k,
ci = (sinAlpha * dy - cosAlpha * dx) / k,
fi = (sinAlpha * dx + cosAlpha * dy) / k;
function transform(x, y) {
return [a * x - b * y + dx, dy - b * x - a * y];
}
transform.invert = function(x, y) {
return [ai * x - bi * y + ci, fi - bi * x - ai * y];
};
return transform;
}
export default function projection(project) {
return projectionMutator(function() { return project; })();
}
export function projectionMutator(projectAt) {
var project,
k = 150, // scale
x = 480, y = 250, // translate
lambda = 0, phi = 0, // center
deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, // pre-rotate
alpha = 0, // post-rotate
theta = null, preclip = clipAntimeridian, // pre-clip angle
x0 = null, y0, x1, y1, postclip = identity, // post-clip extent
delta2 = 0.5, // precision
projectResample,
projectTransform,
projectRotateTransform,
cache,
cacheStream;
function projection(point) {
return projectRotateTransform(point[0] * radians, point[1] * radians);
}
function invert(point) {
point = projectRotateTransform.invert(point[0], point[1]);
return point && [point[0] * degrees, point[1] * degrees];
}
projection.stream = function(stream) {
return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
};
projection.preclip = function(_) {
return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;
};
projection.postclip = function(_) {
return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
};
projection.clipAngle = function(_) {
return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees;
};
projection.clipExtent = function(_) {
return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
};
projection.scale = function(_) {
return arguments.length ? (k = +_, recenter()) : k;
};
projection.translate = function(_) {
return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
};
projection.center = function(_) {
return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees, phi * degrees];
};
projection.rotate = function(_) {
return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees, deltaPhi * degrees, deltaGamma * degrees];
};
projection.angle = function(_) {
return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees;
};
projection.precision = function(_) {
return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
};
projection.fitExtent = function(extent, object) {
return fitExtent(projection, extent, object);
};
projection.fitSize = function(size, object) {
return fitSize(projection, size, object);
};
projection.fitWidth = function(width, object) {
return fitWidth(projection, width, object);
};
projection.fitHeight = function(height, object) {
return fitHeight(projection, height, object);
};
function recenter() {
var center = scaleTranslateRotate(k, 0, 0, alpha).apply(null, project(lambda, phi)),
transform = (alpha ? scaleTranslateRotate : scaleTranslate)(k, x - center[0], y - center[1], alpha);
rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma);
projectTransform = compose(project, transform);
projectRotateTransform = compose(rotate, projectTransform);
projectResample = resample(projectTransform, delta2);
return reset();
}
function reset() {
cache = cacheStream = null;
return projection;
}
return function() {
project = projectAt.apply(this, arguments);
projection.invert = project.invert && invert;
return recenter();
};
}
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