novo corpo

data-pipeline/scripts/mannequin-asset/repose_and_export.py

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+"""Reposiciona os bracos do 'GEO-body_male_realistic' (bundle Human Base
+Meshes da Blender Studio, CC0) da pose relaxada original para posicao
+anatomica (bracos retos ao lado do corpo), e exporta pra GLB.
+
+Rodar de dentro do Blender, sem interface:
+
+    blender --background human_base_meshes_bundle.blend \
+        --python repose_and_export.py
+
+A malha nao tem armature, entao a repose e feita rotacionando os vertices
+do braco em torno de um pivo no ombro. O angulo de rotacao e MEDIDO na
+propria malha (distancia/posicao do vertice mais distante do ombro dentro
+da faixa de altura do braco), nao e um valor chutado, entao continua
+funcionando mesmo que uma versao futura do bundle mude a pose de origem.
+Uma janela suave (smoothstep) evita costura na axila.
+"""
+
+import math
+
+import bpy
+
+BODY_OBJECT = "GEO-body_male_realistic"
+EYE_OBJECTS = ["GEO-body_male_realistic.eye.L", "GEO-body_male_realistic.eye.R"]
+MULTIRES_LEVEL = 1  # ~42k triangulos: mantem a definicao muscular visivel a distancia normal de camera, bem mais leve que o nivel 3 (~677k) do arquivo original
+OUTPUT_PATH = "/tmp/mannequin-realistic.glb"
+SKIN_COLOR = (0.56, 0.64, 0.78, 1.0)  # mesmo tom usado no Mannequin.tsx anterior
+
+
+def smoothstep(edge0, edge1, x):
+    t = max(0.0, min(1.0, (x - edge0) / (edge1 - edge0)))
+    return t * t * (3 - 2 * t)
+
+
+def repose_arms(obj):
+    mesh = obj.data
+    zs = [v.co.z for v in mesh.vertices]
+    z_min, z_max = min(zs), max(zs)
+    height = z_max - z_min
+    centerline_x = sum(v.co.x for v in mesh.vertices) / len(mesh.vertices)
+
+    shoulder_z = z_min + 0.84 * height
+    # comfortably above o alargamento do pe/tornozelo, abaixo de onde a mao
+    # fica nesta pose relaxada — deixa uma folga clara entre perna e braço
+    arm_low_z = z_min + 0.30 * height
+    torso_half_width = 0.20  # metade da largura biacromial aproximada, nesta escala
+
+    for side in (1, -1):
+        pivot_x = centerline_x + side * torso_half_width * 0.85
+
+        candidates = [
+            v
+            for v in mesh.vertices
+            if side * (v.co.x - centerline_x) > torso_half_width
+            and arm_low_z < v.co.z < shoulder_z - 0.02
+        ]
+        far = max(
+            candidates,
+            key=lambda v: (v.co.x - pivot_x) ** 2 + (v.co.z - shoulder_z) ** 2,
+        )
+        angle = math.atan2(far.co.x - pivot_x, -(far.co.z - shoulder_z))
+
+        for v in mesh.vertices:
+            dx = v.co.x - centerline_x
+            if side * dx <= 0 or v.co.z >= shoulder_z + 0.03:
+                continue
+            weight_x = smoothstep(torso_half_width * 0.7, torso_half_width * 1.15, abs(dx))
+            weight_z = smoothstep(arm_low_z - 0.08, arm_low_z + 0.07, v.co.z)
+            weight = weight_x * weight_z
+            if weight <= 0.001:
+                continue
+            rot = -weight * angle
+            cos_a, sin_a = math.cos(rot), math.sin(rot)
+            px, pz = v.co.x - pivot_x, v.co.z - shoulder_z
+            v.co.x = pivot_x + (px * cos_a - pz * sin_a)
+            v.co.z = shoulder_z + (px * sin_a + pz * cos_a)
+
+    mesh.update()
+
+
+def main():
+    body = bpy.data.objects[BODY_OBJECT]
+    repose_arms(body)
+
+    for mod in body.modifiers:
+        if mod.type == "MULTIRES":
+            mod.levels = MULTIRES_LEVEL
+
+    mat = bpy.data.materials.new("MannequinSkin")
+    mat.use_nodes = True
+    mat.node_tree.nodes["Principled BSDF"].inputs["Base Color"].default_value = SKIN_COLOR
+    mat.node_tree.nodes["Principled BSDF"].inputs["Roughness"].default_value = 0.6
+
+    targets = [body] + [bpy.data.objects[n] for n in EYE_OBJECTS if n in bpy.data.objects]
+    for obj in targets:
+        obj.data.materials.clear()
+        obj.data.materials.append(mat)
+
+    bpy.ops.object.select_all(action="DESELECT")
+    for obj in targets:
+        obj.select_set(True)
+    bpy.context.view_layer.objects.active = body
+
+    bpy.ops.export_scene.gltf(
+        filepath=OUTPUT_PATH,
+        export_format="GLB",
+        use_selection=True,
+        export_apply=True,
+        export_yup=True,
+    )
+    print(f"Exportado para {OUTPUT_PATH}")
+
+
+main()