mirror of
https://github.com/JannisX11/blockbench.git
synced 2025-01-30 15:42:42 +08:00
Rewrite OBJ exporter to support quads
This commit is contained in:
JannisX11
parent
ab15270057
commit
92d8d13c17
@ -8,11 +8,19 @@ function getMtlFace(obj, index) {
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if (tex === null) {
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return false
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} else if (!tex || typeof tex === 'string') {
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return 'usemtl none\n'
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return 'usemtl none'
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} else {
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return 'usemtl m_' + tex.id + '\n';
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return 'usemtl m_' + tex.id;
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}
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}
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const cube_face_normals = {
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north: '0 0 -1',
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east: '1 0 0',
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south: '0 0 1',
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west: '-1 0 0',
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up: '0 1 0',
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down: '0 -1 0',
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}
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var codec = new Codec('obj', {
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name: 'OBJ Wavefront Model',
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@ -29,7 +37,7 @@ var codec = new Codec('obj', {
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*/
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let materials = {};
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let output = '# Made in Blockbench '+appVersion+'\n';
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let output = ['# Made in Blockbench '+appVersion];
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let indexVertex = 0;
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let indexVertexUvs = 0;
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let indexNormals = 0;
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@ -39,7 +47,7 @@ var codec = new Codec('obj', {
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const uv = new THREE.Vector2();
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const face = [];
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output += 'mtllib ' + (options.mtl_name||'materials.mtl') +'\n';
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output.push('mtllib ' + (options.mtl_name||'materials.mtl') +'\n');
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var scale = 1/16;
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@ -57,117 +65,255 @@ var codec = new Codec('obj', {
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if (element.export === false) return;
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const vertices = geometry.getAttribute( 'position' );
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const normals = geometry.getAttribute( 'normal' );
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const uvs = geometry.getAttribute( 'uv' );
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const indices = geometry.getIndex(); // name of the mesh object
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if (element instanceof Cube) {
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output += 'o ' + mesh.name + '\n'; // name of the mesh material
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output.push(`o ${element.name||'cube'}`)
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if ( mesh.material && mesh.material.name ) {
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output += 'usemtl ' + mesh.material.name + '\n';
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} // vertices
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if ( vertices !== undefined ) {
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for ( let i = 0, l = vertices.count; i < l; i ++, nbVertex ++ ) {
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vertex.x = vertices.getX( i );
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vertex.y = vertices.getY( i );
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vertex.z = vertices.getZ( i ); // transform the vertex to world space
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vertex.applyMatrix4( mesh.matrixWorld ); // transform the vertex to export format
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output += 'v ' + vertex.x + ' ' + vertex.y + ' ' + vertex.z + '\n';
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function addVertex(x, y, z) {
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vertex.set(x - element.origin[0], y - element.origin[1], z - element.origin[2]);
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vertex.applyMatrix4( mesh.matrixWorld );
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output.push('v ' + vertex.x + ' ' + vertex.y + ' ' + vertex.z);
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nbVertex++;
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}
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addVertex(element.to[0] - element.inflate, element.to[1] - element.inflate, element.to[2] - element.inflate);
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addVertex(element.to[0] - element.inflate, element.to[1] - element.inflate, element.from[2] - element.inflate);
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addVertex(element.to[0] - element.inflate, element.from[1] - element.inflate, element.to[2] - element.inflate);
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addVertex(element.to[0] - element.inflate, element.from[1] - element.inflate, element.from[2] - element.inflate);
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addVertex(element.from[0] - element.inflate, element.to[1] - element.inflate, element.from[2] - element.inflate);
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addVertex(element.from[0] - element.inflate, element.to[1] - element.inflate, element.to[2] - element.inflate);
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addVertex(element.from[0] - element.inflate, element.from[1] - element.inflate, element.from[2] - element.inflate);
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addVertex(element.from[0] - element.inflate, element.from[1] - element.inflate, element.to[2] - element.inflate);
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for (let key in element.faces) {
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if (element.faces[key].texture != null) {
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let face = element.faces[key];
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output.push(`vt ${face.uv[0] / Project.texture_width} ${1 - face.uv[1] / Project.texture_height}`);
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output.push(`vt ${face.uv[2] / Project.texture_width} ${1 - face.uv[1] / Project.texture_height}`);
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output.push(`vt ${face.uv[2] / Project.texture_width} ${1 - face.uv[3] / Project.texture_height}`);
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output.push(`vt ${face.uv[0] / Project.texture_width} ${1 - face.uv[3] / Project.texture_height}`);
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nbVertexUvs += 4;
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}
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}
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for (let key in element.faces) {
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if (element.faces[key].texture != null) {
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output.push(`vn ${cube_face_normals[key]}`)
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nbNormals += 1;
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}
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}
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} // uvs
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if ( uvs !== undefined ) {
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for ( let i = 0, l = uvs.count; i < l; i ++, nbVertexUvs ++ ) {
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uv.x = uvs.getX( i );
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uv.y = uvs.getY( i ); // transform the uv to export format
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output += 'vt ' + uv.x + ' ' + uv.y + '\n';
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}
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} // normals
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if ( normals !== undefined ) {
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normalMatrixWorld.getNormalMatrix( mesh.matrixWorld );
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for ( let i = 0, l = normals.count; i < l; i ++, nbNormals ++ ) {
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normal.x = normals.getX( i );
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normal.y = normals.getY( i );
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normal.z = normals.getZ( i ); // transform the normal to world space
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normal.applyMatrix3( normalMatrixWorld ).normalize(); // transform the normal to export format
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output += 'vn ' + normal.x + ' ' + normal.y + ' ' + normal.z + '\n';
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}
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}
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// material
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for (let key in element.faces) {
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let tex = element.faces[key].getTexture()
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if (tex && tex.uuid && !materials[tex.id]) {
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materials[tex.id] = tex
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}
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}
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// faces
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if ( indices !== null ) {
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for ( let i = 0, l = indices.count; i < l; i += 3 ) {
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let f_mat = getMtlFace(element, geometry.groups[ Math.floor(i / 6) ].materialIndex)
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if (f_mat) {
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if (i % 2 === 0) {
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output += f_mat
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let mtl;
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let i = 0;
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for (let key in element.faces) {
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if (element.faces[key].texture != null) {
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let tex = element.faces[key].getTexture()
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if (tex && tex.uuid && !materials[tex.id]) {
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materials[tex.id] = tex;
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}
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let mtl_new = (!tex || typeof tex === 'string')
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? 'none'
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: 'm_' + tex.id;
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if (mtl_new != mtl) {
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mtl = mtl_new;
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output.push('usemtl '+mtl);
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}
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let vertices;
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switch (key) {
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case 'north': vertices = [2, 5, 7, 4]; break;
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case 'east': vertices = [1, 2, 4, 3]; break;
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case 'south': vertices = [1, 6, 8, 3]; break;
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case 'west': vertices = [5, 6, 8, 7]; break;
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case 'up': vertices = [5, 2, 1, 6]; break;
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case 'down': vertices = [8, 3, 4, 7]; break;
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}
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output.push('f '+[
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`${vertices[0] + indexVertex}/${i*4 + 1 + indexVertexUvs}/${i+1+indexNormals}`,
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`${vertices[1] + indexVertex}/${i*4 + 2 + indexVertexUvs}/${i+1+indexNormals}`,
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`${vertices[2] + indexVertex}/${i*4 + 3 + indexVertexUvs}/${i+1+indexNormals}`,
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`${vertices[3] + indexVertex}/${i*4 + 4 + indexVertexUvs}/${i+1+indexNormals}`,
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].join(' '));
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i++;
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}
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}
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} else if (element instanceof Mesh) {
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output.push(`o ${element.name||'mesh'}`)
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let vertex_keys = [];
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function addVertex(x, y, z) {
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vertex.set(x - element.origin[0], y - element.origin[1], z - element.origin[2]);
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vertex.applyMatrix4( mesh.matrixWorld );
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output.push('v ' + vertex.x + ' ' + vertex.y + ' ' + vertex.z);
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nbVertex++;
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}
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for (let vkey in element.vertices) {
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addVertex(...element.vertices[vkey]);
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vertex_keys.push(vkey);
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}
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let mtl;
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let i = 0;
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let vertexnormals = [];
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let faces = [];
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for (let key in element.faces) {
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if (element.faces[key].texture != null && element.faces[key].vertices.length >= 3) {
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let face = element.faces[key];
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let vertices = face.getSortedVertices();
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let tex = element.faces[key].getTexture();
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vertices.forEach(vkey => {
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output.push(`vt ${face.uv[vkey][0] / Project.texture_width} ${1 - face.uv[vkey][1] / Project.texture_height}`);
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nbVertexUvs += 1;
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})
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vertexnormals.push(`vn ${face.getNormal(true).join(' ')}`)
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nbNormals += 1;
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if (tex && tex.uuid && !materials[tex.id]) {
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materials[tex.id] = tex;
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}
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let mtl_new = (!tex || typeof tex === 'string')
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? 'none'
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: 'm_' + tex.id;
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if (mtl_new != mtl) {
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mtl = mtl_new;
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faces.push('usemtl '+mtl);
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}
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let triplets = [];
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vertices.forEach((vkey, vi) => {
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let triplet = [
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vertex_keys.indexOf(vkey) + 1 + indexVertex,
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nbVertexUvs - vertices.length + vi + 1 + indexVertexUvs,
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i+1+indexNormals,
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]
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triplets.push(triplet.join('/'));
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})
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faces.push('f ' + triplets.join(' '));
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i++;
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}
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}
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output.push(...vertexnormals);
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output.push(...faces);
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} else {
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const vertices = geometry.getAttribute( 'position' );
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const normals = geometry.getAttribute( 'normal' );
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const uvs = geometry.getAttribute( 'uv' );
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const indices = geometry.getIndex();
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output.push('o ' + mesh.name); // name of the mesh material
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if ( mesh.material && mesh.material.name ) {
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output.push('usemtl ' + mesh.material.name);
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} // vertices
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if ( vertices !== undefined ) {
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for ( let i = 0, l = vertices.count; i < l; i ++, nbVertex ++ ) {
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vertex.x = vertices.getX( i );
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vertex.y = vertices.getY( i );
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vertex.z = vertices.getZ( i ); // transform the vertex to world space
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vertex.applyMatrix4( mesh.matrixWorld ); // transform the vertex to export format
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output.push('v ' + vertex.x + ' ' + vertex.y + ' ' + vertex.z);
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}
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} // uvs
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if ( uvs !== undefined ) {
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for ( let i = 0, l = uvs.count; i < l; i ++, nbVertexUvs ++ ) {
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uv.x = uvs.getX( i );
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uv.y = uvs.getY( i ); // transform the uv to export format
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output.push('vt ' + uv.x + ' ' + uv.y);
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}
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} // normals
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if ( normals !== undefined ) {
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normalMatrixWorld.getNormalMatrix( mesh.matrixWorld );
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for ( let i = 0, l = normals.count; i < l; i ++, nbNormals ++ ) {
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normal.x = normals.getX( i );
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normal.y = normals.getY( i );
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normal.z = normals.getZ( i ); // transform the normal to world space
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normal.applyMatrix3( normalMatrixWorld ).normalize(); // transform the normal to export format
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output.push('vn ' + normal.x + ' ' + normal.y + ' ' + normal.z );
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}
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}
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// material
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for (let key in element.faces) {
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let tex = element.faces[key].getTexture()
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if (tex && tex.uuid && !materials[tex.id]) {
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materials[tex.id] = tex
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}
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}
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// faces
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if ( indices !== null ) {
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for ( let i = 0, l = indices.count; i < l; i += 3 ) {
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let f_mat = getMtlFace(element, geometry.groups[ Math.floor(i / 6) ].materialIndex)
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if (f_mat) {
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if (i % 2 === 0) {
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output.push(f_mat)
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}
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for ( let m = 0; m < 3; m ++ ) {
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const j = indices.getX( i + m ) + 1;
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face[ m ] = indexVertex + j + ( normals || uvs ? '/' + ( uvs ? indexVertexUvs + j : '' ) + ( normals ? '/' + ( indexNormals + j ) : '' ) : '' );
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} // transform the face to export format
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output.push('f ' + face.join( ' ' ) );
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}
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}
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} else {
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for ( let i = 0, l = vertices.count; i < l; i += 3 ) {
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for ( let m = 0; m < 3; m ++ ) {
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const j = indices.getX( i + m ) + 1;
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const j = i + m + 1;
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face[ m ] = indexVertex + j + ( normals || uvs ? '/' + ( uvs ? indexVertexUvs + j : '' ) + ( normals ? '/' + ( indexNormals + j ) : '' ) : '' );
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} // transform the face to export format
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output += 'f ' + face.join( ' ' ) + '\n';
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output.push('f ' + face.join( ' ' ) );
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}
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}
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} else {
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for ( let i = 0, l = vertices.count; i < l; i += 3 ) {
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for ( let m = 0; m < 3; m ++ ) {
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const j = i + m + 1;
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face[ m ] = indexVertex + j + ( normals || uvs ? '/' + ( uvs ? indexVertexUvs + j : '' ) + ( normals ? '/' + ( indexNormals + j ) : '' ) : '' );
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} // transform the face to export format
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output += 'f ' + face.join( ' ' ) + '\n';
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}
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}
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// update index
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@ -196,6 +342,8 @@ var codec = new Codec('obj', {
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scene.position.copy(old_scene_position)
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output = output.join('\n');
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_obj_export = {
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obj: output,
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mtl: mtlOutput,
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Reference in New Issue
Block a user