mohanki/titan3d_react_node_sqllite
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fix: correct UV mapping horizontal flip issue on cylindrical and spherical projections
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AI Bot
2026-09-30 18:26:43 +05:30
parent f898dfadb4
commit cf3c114172
1 changed files with 2 additions and 2 deletions
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src/lib/bakingUtils.ts
+2 -2
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@@ -40,7 +40,7 @@ export function reprojectUVs(geometry: THREE.BufferGeometry, mappingType: 'plana
const centeredZ = z - center.z; const centeredZ = z - center.z;
// atan2 returns -PI to PI. We want 0 to 1 around the cylinder. // atan2 returns -PI to PI. We want 0 to 1 around the cylinder.
let angle = Math.atan2(centeredZ, centeredX); let angle = Math.atan2(centeredZ, centeredX);
u = (angle + Math.PI) / (2 * Math.PI); u = 1.0 - ((angle + Math.PI) / (2 * Math.PI));
v = 1.0 - ny; v = 1.0 - ny;
} else if (mappingType === 'sphere') { } else if (mappingType === 'sphere') {
// Spherical projection // Spherical projection
@@ -52,7 +52,7 @@ export function reprojectUVs(geometry: THREE.BufferGeometry, mappingType: 'plana
const phi = Math.acos(centeredY / radius); // 0 to PI const phi = Math.acos(centeredY / radius); // 0 to PI
let theta = Math.atan2(centeredZ, centeredX); // -PI to PI let theta = Math.atan2(centeredZ, centeredX); // -PI to PI
u = (theta + Math.PI) / (2 * Math.PI); u = 1.0 - ((theta + Math.PI) / (2 * Math.PI));
v = phi / Math.PI; // 0 at top, 1 at bottom v = phi / Math.PI; // 0 at top, 1 at bottom
} else if (mappingType === 'box') { } else if (mappingType === 'box') {
// Simple box projection (pick dominant axis based on normal) // Simple box projection (pick dominant axis based on normal)