133 lines
3.1 KiB
TypeScript
133 lines
3.1 KiB
TypeScript
import { TERRAIN_LAYER_COUNT } from "../document/terrains";
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export type TerrainBrushTool =
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| "raise"
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| "lower"
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| "smooth"
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| "flatten"
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| "paint";
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export interface TerrainBrushSettings {
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radius: number;
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strength: number;
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falloff: number;
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}
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export interface ArmedTerrainSculptBrushState extends TerrainBrushSettings {
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terrainId: string;
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tool: Exclude<TerrainBrushTool, "paint">;
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}
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export interface ArmedTerrainPaintBrushState extends TerrainBrushSettings {
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terrainId: string;
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tool: "paint";
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layerIndex: number;
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}
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export type ArmedTerrainBrushState =
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| ArmedTerrainSculptBrushState
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| ArmedTerrainPaintBrushState;
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export interface TerrainSampleValuePatch {
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index: number;
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before: number;
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after: number;
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}
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export interface TerrainBrushPatch {
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terrainId: string;
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heightSamples: TerrainSampleValuePatch[];
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paintWeights: TerrainSampleValuePatch[];
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}
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export interface TerrainBrushStrokeCommit {
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terrainId: string;
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patch: TerrainBrushPatch;
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commandLabel: string;
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tool: TerrainBrushTool;
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}
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export const DEFAULT_TERRAIN_BRUSH_RADIUS = 2;
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export const DEFAULT_TERRAIN_BRUSH_STRENGTH = 0.35;
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export const DEFAULT_TERRAIN_BRUSH_FALLOFF = 0.6;
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export const MIN_TERRAIN_BRUSH_RADIUS = 0.25;
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export const MAX_TERRAIN_BRUSH_RADIUS = 12;
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export const MIN_TERRAIN_BRUSH_STRENGTH = 0.05;
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export const MAX_TERRAIN_BRUSH_STRENGTH = 1;
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export const MIN_TERRAIN_BRUSH_FALLOFF = 0;
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export const MAX_TERRAIN_BRUSH_FALLOFF = 1;
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function clamp(value: number, min: number, max: number): number {
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return Math.min(max, Math.max(min, value));
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}
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export function clampTerrainBrushRadius(radius: number): number {
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if (!Number.isFinite(radius)) {
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return DEFAULT_TERRAIN_BRUSH_RADIUS;
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}
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return clamp(radius, MIN_TERRAIN_BRUSH_RADIUS, MAX_TERRAIN_BRUSH_RADIUS);
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}
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export function clampTerrainBrushStrength(strength: number): number {
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if (!Number.isFinite(strength)) {
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return DEFAULT_TERRAIN_BRUSH_STRENGTH;
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}
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return clamp(
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strength,
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MIN_TERRAIN_BRUSH_STRENGTH,
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MAX_TERRAIN_BRUSH_STRENGTH
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);
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}
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export function clampTerrainBrushFalloff(falloff: number): number {
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if (!Number.isFinite(falloff)) {
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return DEFAULT_TERRAIN_BRUSH_FALLOFF;
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}
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return clamp(
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falloff,
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MIN_TERRAIN_BRUSH_FALLOFF,
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MAX_TERRAIN_BRUSH_FALLOFF
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);
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}
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export function createDefaultTerrainBrushSettings(): TerrainBrushSettings {
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return {
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radius: DEFAULT_TERRAIN_BRUSH_RADIUS,
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strength: DEFAULT_TERRAIN_BRUSH_STRENGTH,
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falloff: DEFAULT_TERRAIN_BRUSH_FALLOFF
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};
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}
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export function clampTerrainPaintLayerIndex(layerIndex: number): number {
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if (!Number.isFinite(layerIndex)) {
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return 0;
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}
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return Math.min(
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TERRAIN_LAYER_COUNT - 1,
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Math.max(0, Math.round(layerIndex))
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);
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}
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export function getTerrainBrushToolLabel(tool: TerrainBrushTool): string {
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switch (tool) {
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case "raise":
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return "Raise";
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case "lower":
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return "Lower";
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case "smooth":
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return "Smooth";
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case "flatten":
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return "Flatten";
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case "paint":
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return "Paint";
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}
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}
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export function getTerrainBrushCommandLabel(tool: TerrainBrushTool): string {
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return `${getTerrainBrushToolLabel(tool)} terrain`;
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}
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