From eec2e94ce1f2848aec1e9d55e99b6580a83d1ef6 Mon Sep 17 00:00:00 2001
From: Wuzzy <Wuzzy@disroot.org>
Date: Fri, 27 Oct 2023 17:06:27 +0200
Subject: [PATCH] First step for v6 biome rendering mode

---
 index.html |  28 +++++---
 mibpov.js  | 197 +++++++++++++++++++++++++++++++++++++++++++++++------
 2 files changed, 195 insertions(+), 30 deletions(-)

diff --git a/index.html b/index.html
index c3cd4c1..e34a4ba 100644
--- a/index.html
+++ b/index.html
@@ -19,14 +19,22 @@ ERROR: This tool requires JavaScript to work, but JavaScript is disabled in your
 </div>
 </noscript>
 </div>
+
 <!-- The main content container starts hidden so it doesn't clutter
 the page in noscript mode. It will be unhidden once the JavaScript loads -->
 <div id="mainContentContainer" class="contentContainer" hidden>
+
+<div id="modeContainer">
+	<button id="modernModeButton" type="button">Modern biomes</button>
+	<button id="v6ModeButton" type="button">v6 biomes</button>
+</div>
+
 <div id="canvasContainer">
 <canvas id="voronoiCanvas" width="500" height="500">
 A Voronoi diagram is supposed to be here but for some reason it cannot be displayed. This tool is useless without this functionality.
 </canvas> 
 </div>
+
 <div id="diagramInfoContainer" class="borderedSection">
 <span id="errorMessage" hidden></span>
 <span id="altitudeDisplay"></span>
@@ -36,7 +44,8 @@ A Voronoi diagram is supposed to be here but for some reason it cannot be displa
 <span id="coordinateDisplay">&nbsp;</span>
 <br>
 </div>
-<div>
+
+<div id="biomeConfigContainerOuter">
 <h2 class="configHeader"><span class="collapser" id="biomeConfigHeaderLink">▼</span> Biome configuration</h2>
 <div id="biomeConfigContainer" class="configFrame">
 <form id="biomeForm">
@@ -78,7 +87,9 @@ A Voronoi diagram is supposed to be here but for some reason it cannot be displa
 	</div>
 </form>
 </div>
-<div>
+</div>
+
+<div id="viewConfigContainerOuter">
 <h2 class="configHeader"><span class="collapser" id="viewConfigHeaderLink">▼</span> Diagram view settings</h2>
 <div id="viewConfigContainer" class="configFrame">
 <form id="viewForm">
@@ -104,11 +115,12 @@ A Voronoi diagram is supposed to be here but for some reason it cannot be displa
 </form>
 </div>
 </div>
-<div>
+
+<div id="noiseConfigContainerOuter">
 <h2 class="configHeader"><span class="collapser" id="noiseConfigHeaderLink">▼</span> Noise parameters</h2>
 <div class="configFrame" id="noiseConfigContainer">
 <form id="noiseForm">
-	<h3>Heat (<code>mg_biome_np_heat</code>)</h3>
+	<h3>Heat (<code id="noiseSettingNameHeat">mg_biome_np_heat</code>)</h3>
 	<label for="inputNoiseHeatOffset">Offset:&nbsp;</label>
 	<input id="inputNoiseHeatOffset" type="number" value="50" size="10">
 
@@ -121,7 +133,7 @@ A Voronoi diagram is supposed to be here but for some reason it cannot be displa
 	<label for="inputNoiseHeatPersistence">Persistence:&nbsp;</label>
 	<input id="inputNoiseHeatPersistence" type="number" value="0.5" step=0.01 size="10">
 
-	<h3>Humidity (<code>mg_biome_np_humidity</code>)</h3>
+	<h3>Humidity (<code id="noiseSettingNameHumidity">mg_biome_np_humidity</code>)</h3>
 	<label for="inputNoiseHumidityOffset">Offset:&nbsp;</label>
 	<input id="inputNoiseHumidityOffset" type="number" value="50" size="10">
 
@@ -139,9 +151,8 @@ A Voronoi diagram is supposed to be here but for some reason it cannot be displa
 </form>
 </div>
 </div>
-</div>
 
-<div>
+<div id="importContainerOuter">
 <h2 class="configHeader"><span class="collapser" id="importHeaderLink">▶</span> Import</h2>
 <div class="configFrame" id="importContainer" style="display:none">
 <form id="importForm">
@@ -156,7 +167,7 @@ A Voronoi diagram is supposed to be here but for some reason it cannot be displa
 </div>
 </div>
 
-<div>
+<div id="exportContainerOuter">
 <h2 class="configHeader"><span class="collapser" id="exportHeaderLink">▶</span> Export</h2>
 <div class="configFrame" id="exportContainer" style="display:none">
 <form id="exportForm">
@@ -172,6 +183,7 @@ A Voronoi diagram is supposed to be here but for some reason it cannot be displa
 </form>
 </div>
 </div>
+
 </div>
 
 <hr>
diff --git a/mibpov.js b/mibpov.js
index 9e370b1..f53c972 100644
--- a/mibpov.js
+++ b/mibpov.js
@@ -6,6 +6,7 @@ const MAX_Y_DEFAULT = 31000
 
 // Draw a grid line every GRID_STEP units
 const GRID_STEP = 10
+const GRID_STEP_V6 = 0.2
 
 // Size of the resizing corner
 const RESIZE_CORNER = 14;
@@ -116,25 +117,45 @@ const NOISE_SCALE_DEFAULT = 50;
 const NOISE_PERSISTENCE_DEFAULT = 0.5;
 const NOISE_OCTAVES_DEFAULT = 3;
 const NOISE_ABSVALUE_DEFAULT = false;
+const NOISE_V6_OFFSET_DEFAULT = 0;
+const NOISE_V6_SCALE_DEFAULT = 1;
+const NOISE_V6_PERSISTENCE_DEFAULT = 0.5;
+const NOISE_V6_OCTAVES_DEFAULT = 3;
+const NOISE_V6_ABSVALUE_DEFAULT = false;
 
 // Current noise values
 let noises = {
-	heat: {
+	heat_modern: {
 		offset: NOISE_OFFSET_DEFAULT,
 		scale: NOISE_SCALE_DEFAULT,
 		octaves: NOISE_OCTAVES_DEFAULT,
 		persistence: NOISE_PERSISTENCE_DEFAULT,
 		absvalue: NOISE_ABSVALUE_DEFAULT,
 	},
-	humidity: {
+	humidity_modern: {
 		offset: NOISE_OFFSET_DEFAULT,
 		scale: NOISE_SCALE_DEFAULT,
 		octaves: NOISE_OCTAVES_DEFAULT,
 		persistence: NOISE_PERSISTENCE_DEFAULT,
 		absvalue: NOISE_ABSVALUE_DEFAULT,
 	},
-
+	heat_v6: {
+		offset: NOISE_V6_OFFSET_DEFAULT,
+		scale: NOISE_V6_SCALE_DEFAULT,
+		octaves: NOISE_V6_OCTAVES_DEFAULT,
+		persistence: NOISE_V6_PERSISTENCE_DEFAULT,
+		absvalue: NOISE_V6_ABSVALUE_DEFAULT,
+	},
+	humidity_v6: {
+		offset: NOISE_V6_OFFSET_DEFAULT,
+		scale: NOISE_V6_SCALE_DEFAULT,
+		octaves: NOISE_V6_OCTAVES_DEFAULT,
+		persistence: NOISE_V6_PERSISTENCE_DEFAULT,
+		absvalue: NOISE_V6_ABSVALUE_DEFAULT,
+	},
 };
+noises.heat = noises.heat_modern;
+noises.humidity = noises.humidity_modern;
 
 function updateAreaVarsFor(noiseType) {
 	let noise = noises[noiseType];
@@ -442,7 +463,7 @@ function putPoint(context, point) {
 };
 
 /* Put the grid on the draw context */
-function putGrid(context) {
+function putGrid(context, gridStep) {
 	let [limit_x_min, limit_y_min] = biomeCoordsToCanvasPixelCoords(limit_heat_min, limit_humidity_min);
 	let [limit_x_max, limit_y_max] = biomeCoordsToCanvasPixelCoords(limit_heat_max, limit_humidity_max);
 
@@ -457,8 +478,8 @@ function putGrid(context) {
 	// on the canvas.
 	// This code will effectively trigger if the value range
 	// is very high.
-	let xGridLinesPerPixel = (limit_heat_max-limit_heat_min) / voronoiCanvas.width / GRID_STEP;
-	let yGridLinesPerPixel = (limit_humidity_max-limit_humidity_min) / voronoiCanvas.height/ GRID_STEP;
+	let xGridLinesPerPixel = (limit_heat_max-limit_heat_min) / voronoiCanvas.width / gridStep;
+	let yGridLinesPerPixel = (limit_humidity_max-limit_humidity_min) / voronoiCanvas.height/ gridStep;
 	let xWidth = GRID_WIDTH_LEVEL_3;
 	let yWidth = GRID_WIDTH_LEVEL_3;
 	if (xGridLinesPerPixel > GRID_THRESHOLD_LEVEL_0) {
@@ -484,13 +505,13 @@ function putGrid(context) {
 		context.beginPath();
 		let x = -xWidth*2;
 		let [heat, _] = canvasPixelCoordsToBiomeCoords(x, 0);
-		heat = heat - (heat % GRID_STEP);
+		heat = heat - (heat % gridStep);
 		steps = 0;
 		while (x < voronoiCanvas.width + xWidth*2) {
 			[x, _] = biomeCoordsToCanvasPixelCoords(heat, 0);
 			context.moveTo(x, limit_y_min);
 			context.lineTo(x, limit_y_max);
-			heat += GRID_STEP;
+			heat += gridStep;
 			steps++;
 			if (steps > 10000) {
 				console.error("Over 10000 grid lines on the X axis!");
@@ -505,13 +526,13 @@ function putGrid(context) {
 		context.beginPath();
 		let y = -yWidth*2;
 		let [_, humidity] = canvasPixelCoordsToBiomeCoords(0, y);
-		humidity = humidity - (humidity % GRID_STEP);
+		humidity = humidity - (humidity % gridStep);
 		steps = 0;
 		while (y < voronoiCanvas.height + yWidth*2) {
 			[_, y] = biomeCoordsToCanvasPixelCoords(0, humidity);
 			context.moveTo(limit_x_min, y);
 			context.lineTo(limit_x_max, y);
-			humidity -= GRID_STEP;
+			humidity -= gridStep;
 			steps++;
 			if (steps > 10000) {
 				console.error("Over 10000 grid lines on the Y axis!");
@@ -802,7 +823,7 @@ function getSelectedBiomeIDAndElement() {
 /* Draws the diagram on the voronoiCanvas.
 Will (re-)calculate the Voronoi diagram if recalculate is true;
 otherwise it may re-use a previous diagram for performance reasons. */
-function draw(recalculate) {
+function drawModern(recalculate) {
 	let context = getDrawContext();
 	let w = voronoiCanvas.width;
 	let h = voronoiCanvas.height;
@@ -996,7 +1017,7 @@ function draw(recalculate) {
 
 	if (points.length > 0) {
 		if (showGrid) {
-			putGrid(context);
+			putGrid(context, GRID_STEP);
 		}
 		if (showAxes) {
 			putAxes(context);
@@ -1055,6 +1076,90 @@ function draw(recalculate) {
 	return true;
 }
 
+function drawV6() {
+	let context = getDrawContext();
+	let w = voronoiCanvas.width;
+	let h = voronoiCanvas.height;
+	let y = getViewY();
+
+	clear();
+
+	if (!context) {
+		if (!voronoiCanvas.hidden) {
+			voronoiCanvas.hidden = true;
+			coordinateDisplay.hidden = true;
+			altitudeDisplay.hidden = true;
+			rangeDisplay.hidden = true;
+			configDiv.hidden = true;
+
+			errorMessage.innerText = "ERROR: Could not get the canvas context which means this tool won't work for you. Maybe your browser does not support the HTML canvas element properly.";
+			console.error("Could not get the canvas context!");
+		}
+		return false;
+	}
+	clear(context);
+
+	let showDiagramMessage = function(context, text) {
+		context.textAlign = "center";
+		context.fillStyle = "black";
+		context.textBaseline = "middle";
+		if (voronoiCanvas.width < 300) {
+			context.font = "100% sans-serif";
+		} else if (voronoiCanvas.width < 450) {
+			context.font = "150% sans-serif";
+		} else {
+			context.font = "200% sans-serif";
+		}
+		context.fillText(text, voronoiCanvas.width/2, voronoiCanvas.height/2);
+		updateAltitudeText();
+	}
+
+	// Fail and render a special message if the value range is tiny
+	if ((limit_heat_max - limit_heat_min < 0.01) || (limit_humidity_max - limit_humidity_min < 0.01)) {
+		showDiagramMessage(context, "Value range is too small.");
+		drawError = true;
+		putResizeCorner(context);
+		return true;
+	}
+
+	// Fail and render a special message if the value range is huge
+	if ((limit_heat_max - limit_heat_min > MAX_HEAT_HUMIDITY_VALUE) || (limit_humidity_max - limit_humidity_min > MAX_HEAT_HUMIDITY_VALUE)) {
+		showDiagramMessage(context, "Value range is too large.");
+		drawError = true;
+		putResizeCorner(context);
+		return true;
+	}
+
+	// Fail and render a special message if value limit is out of permissible bounds
+	if ((limit_heat_max > MAX_HEAT_HUMIDITY_VALUE) || (limit_humidity_max > MAX_HEAT_HUMIDITY_VALUE)) {
+		showDiagramMessage(context, "Maximum value is too large.");
+		drawError = true;
+		putResizeCorner(context);
+		return true;
+	}
+	if ((limit_heat_min < MIN_HEAT_HUMIDITY_VALUE) || (limit_humidity_min < MIN_HEAT_HUMIDITY_VALUE)) {
+		showDiagramMessage(context, "Minimum value is too small.");
+		drawError = true;
+		putResizeCorner(context);
+		return true;
+	}
+
+	if (showGrid) {
+		putGrid(context, GRID_STEP_V6);
+	}
+	if (showAxes) {
+		putAxes(context);
+	}
+}
+
+function draw(recalculate) {
+	if (biomeMode === "v6") {
+		drawV6(recalculate);
+	} else {
+		drawModern(recalculate);
+	}
+}
+
 /* Clears the biome list widget and (re-adds) the list elements
 for the biomes from scratch. */
 function repopulateBiomeSelector() {
@@ -1711,22 +1816,39 @@ inputNoiseHumidityPersistence.oninput = function() {
 inputNoiseHumidityOctaves.oninput = function() {
 	updateNoiseParam("humidity", "octaves", this);
 }
+
 inputNoiseReset.onclick = function() {
-	noises.heat.offset = NOISE_OFFSET_DEFAULT;
-	noises.heat.scale = NOISE_SCALE_DEFAULT;
-	noises.heat.octaves = NOISE_OCTAVES_DEFAULT;
-	noises.heat.persistence = NOISE_PERSISTENCE_DEFAULT;
-	noises.heat.absvalue = NOISE_ABSVALUE_DEFAULT;
+	if (biomeMode === "v6") {
+		noises.heat.offset = NOISE_V6_OFFSET_DEFAULT;
+		noises.heat.scale = NOISE_V6_SCALE_DEFAULT;
+		noises.heat.octaves = NOISE_V6_OCTAVES_DEFAULT;
+		noises.heat.persistence = NOISE_V6_PERSISTENCE_DEFAULT;
+		noises.heat.absvalue = NOISE_V6_ABSVALUE_DEFAULT;
+
+		noises.humidity.offset = NOISE_V6_OFFSET_DEFAULT;
+		noises.humidity.scale = NOISE_V6_SCALE_DEFAULT;
+		noises.humidity.octaves = NOISE_V6_OCTAVES_DEFAULT;
+		noises.humidity.persistence = NOISE_V6_PERSISTENCE_DEFAULT;
+		noises.humidity.absvalue = NOISE_V6_ABSVALUE_DEFAULT;
+	} else {
+		noises.heat.offset = NOISE_OFFSET_DEFAULT;
+		noises.heat.scale = NOISE_SCALE_DEFAULT;
+		noises.heat.octaves = NOISE_OCTAVES_DEFAULT;
+		noises.heat.persistence = NOISE_PERSISTENCE_DEFAULT;
+		noises.heat.absvalue = NOISE_ABSVALUE_DEFAULT;
+
+		noises.humidity.offset = NOISE_OFFSET_DEFAULT;
+		noises.humidity.scale = NOISE_SCALE_DEFAULT;
+		noises.humidity.octaves = NOISE_OCTAVES_DEFAULT;
+		noises.humidity.persistence = NOISE_PERSISTENCE_DEFAULT;
+		noises.humidity.absvalue = NOISE_ABSVALUE_DEFAULT;
+	}
+
 	inputNoiseHeatOffset.value = noises.heat.offset;
 	inputNoiseHeatScale.value = noises.heat.scale;
 	inputNoiseHeatOctaves.value = noises.heat.octaves;
 	inputNoiseHeatPersistence.value = noises.heat.persistence;
 
-	noises.humidity.offset = NOISE_OFFSET_DEFAULT;
-	noises.humidity.scale = NOISE_SCALE_DEFAULT;
-	noises.humidity.octaves = NOISE_OCTAVES_DEFAULT;
-	noises.humidity.persistence = NOISE_PERSISTENCE_DEFAULT;
-	noises.humidity.absvalue = NOISE_ABSVALUE_DEFAULT;
 	inputNoiseHumidityOffset.value = noises.humidity.offset;
 	inputNoiseHumidityScale.value = noises.humidity.scale;
 	inputNoiseHumidityOctaves.value = noises.humidity.octaves;
@@ -1956,6 +2078,37 @@ inputImportSubmit.onclick = function() {
 	}
 }
 
+/* Mode events */
+let biomeMode = "modern";
+modernModeButton.onclick = function() {
+	biomeMode = "modern";
+	biomeConfigContainerOuter.hidden = false;
+	importContainerOuter.hidden = false;
+	exportContainerOuter.hidden = false;
+	inputCheckboxPoints.disabled = false;
+	noises.heat = noises.heat_modern;
+	noises.humidity = noises.humidity_modern;
+	noiseSettingNameHeat.innerText = "mg_biome_np_heat";
+	noiseSettingNameHumidity.innerText = "mg_biome_np_humidity";
+	updateAreaVars();
+	updateWidgetStates();
+	draw(true);
+}
+v6ModeButton.onclick = function() {
+	biomeMode = "v6";
+	biomeConfigContainerOuter.hidden = true;
+	importContainerOuter.hidden = true;
+	exportContainerOuter.hidden = true;
+	inputCheckboxPoints.disabled = true;
+	noises.heat = noises.heat_v6;
+	noises.humidity = noises.humidity_v6;
+	noiseSettingNameHeat.innerText = "mgv6_np_biome";
+	noiseSettingNameHumidity.innerText = "mgv6_np_humidity";
+	updateAreaVars();
+	updateWidgetStates();
+	draw();
+}
+
 /* Events for collapsing/extending config section with the arrow thingie */
 
 biomeConfigHeaderLink.onclick = function() {