Blender >> .obj, .mtl >> Java 使用 min3D, openGL ES >> Android 设备
我做错了什么或者这些 .mtl 或 .obj 文件有什么问题会导致在 min3d 中出现解析器错误？
到目前为止，我只用下划线“mtllib face_mtl”替换了“mtllib face.mtl”中的句点
没有任何东西是表格或间隔的。如果它看起来很奇怪，那是因为我在提交这个问题时犯了错误。
到目前为止，“MatD 教程”中的所有示例都运行良好。只有当我尝试加载自己的文件时，才会遇到问题。
在检查 Wavefront obj 文件的 Wiki 页面时，我逐行查看了这两个文件，但没有运气。
我有一种感觉，这可能与 .mtl 或整个导出中的纹理问题有关。我没有使用 Blender 导出的任何图像或任何其他文件。
非常感谢，我希望这一切都清晰易读。
错误：发生在我在下面的代码中评论的地方
05-11 16:06:01.371：E/AndroidRuntime(2280)：致命异常：GLThread 9
05-11 16:06:01.371: E/AndroidRuntime(2280): java.lang.NullPointerException
05-11 16:06:01.371: E/AndroidRuntime(2280): 在 min3d.parser.ObjParser.readMaterialLib(ObjParser.java:197)
05-11 16:06:01.371: E/AndroidRuntime(2280): 在 min3d.parser.ObjParser.parse(ObjParser.java:107)
05-11 16:06:01.371: E/AndroidRuntime(2280): 在 nbg.min3d.test.Obj3DView.initScene(Obj3DView.java:24)
05-11 16:06:01.371: E/AndroidRuntime(2280): 在 min3d.core.Scene.init(Scene.java:254)
05-11 16:06:01.371: E/AndroidRuntime(2280): 在 min3d.core.Renderer.onSurfaceCreated(Renderer.java:75)
05-11 16:06:01.371: E/AndroidRuntime(2280): 在 android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1317)
05-11 16:06:01.371: E/AndroidRuntime(2280): 在 android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1116)
这是发生错误的地方：
private void readMaterialLib(String libID) {
StringBuffer resourceID = new StringBuffer(packageID);
StringBuffer libIDSbuf = new StringBuffer(libID);
int dotIndex = libIDSbuf.lastIndexOf(".");
if (dotIndex > -1)
libIDSbuf = libIDSbuf.replace(dotIndex, dotIndex + 1, "_");
resourceID.append(":raw/");
resourceID.append(libIDSbuf.toString());
InputStream fileIn = resources.openRawResource(resources.getIdentifier(
resourceID.toString(), null, null));
BufferedReader buffer = new BufferedReader(
new InputStreamReader(fileIn));
String line;
String currentMaterial = "";
try {
while ((line = buffer.readLine()) != null) {
String[] parts = line.split(" ");
if (parts.length == 0)
continue;
String type = parts[0];
if (type.equals(NEW_MATERIAL)) {
if (parts.length > 1) {
currentMaterial = parts[1];
materialMap.put(currentMaterial, new Material(
currentMaterial));
}
} else if(type.equals(DIFFUSE_COLOR) && !type.equals(DIFFUSE_TEX_MAP)) {
Color4 diffuseColor = new Color4(Float.parseFloat(parts[1]) * 255.0f, Float.parseFloat(parts[2]) * 255.0f, Float.parseFloat(parts[3]) * 255.0f, 255.0f);
**//Below is where the error happens.. aka (ObjParser.java: 197)**
materialMap.get(currentMaterial).diffuseColor = diffuseColor;
} else if (type.equals(DIFFUSE_TEX_MAP)) {
if (parts.length > 1) {
materialMap.get(currentMaterial).diffuseTextureMap = parts[1];
StringBuffer texture = new StringBuffer(packageID);
texture.append(":drawable/");
StringBuffer textureName = new StringBuffer(parts[1]);
dotIndex = textureName.lastIndexOf(".");
if (dotIndex > -1)
texture.append(textureName.substring(0, dotIndex));
else
texture.append(textureName);
int bmResourceID = resources.getIdentifier(texture
.toString(), null, null);
Bitmap b = Utils.makeBitmapFromResourceId(bmResourceID);
textureAtlas.addBitmapAsset(new BitmapAsset(currentMaterial, texture.toString()));
}
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
.obj 文件：
# Blender v2.62 (sub 0) OBJ File: 'cylxyzaxis.blend'
# www.blender.org
mtllib face_mtl
o Cylinder.002
v 0.003384 0.016776 -1.001130
v 0.004515 0.016664 -1.001130
v 0.005603 0.016334 -1.001130
v 0.006606 0.015798 -1.001130
v 0.007485 0.015077 -1.001130
v 0.008206 0.014198 -1.001130
v 0.008742 0.013195 -1.001130
v 0.009072 0.012107 -1.001130
v 0.009184 0.010976 -1.001130
v 0.009072 0.009844 -1.001130
v 0.008742 0.008756 -1.001130
v 0.008206 0.007753 -1.001130
v 0.007485 0.006874 -1.001130
v 0.006606 0.006153 -1.001130
v 0.005603 0.005617 -1.001130
v 0.004515 0.005287 -1.001130
v 0.003384 0.005176 -1.001130
v 0.002252 0.005287 -1.001130
v 0.001164 0.005617 -1.001130
v 0.000161 0.006153 -1.001130
v -0.000717 0.006874 -1.001130
v -0.001439 0.007753 -1.001130
v -0.001975 0.008756 -1.001130
v -0.002305 0.009844 -1.001130
v -0.002416 0.010976 -1.001130
v -0.002305 0.012107 -1.001130
v -0.001975 0.013195 -1.001130
v -0.001439 0.014198 -1.001130
v -0.000717 0.015077 -1.001130
v 0.000161 0.015798 -1.001130
v 0.001164 0.016334 -1.001130
v 0.002252 0.016664 -1.001130
v 0.003384 0.016774 0.998870
v 0.004515 0.016663 0.998870
v 0.005603 0.016333 0.998870
v 0.006606 0.015797 0.998870
v 0.007485 0.015076 0.998870
v 0.008206 0.014197 0.998870
v 0.008742 0.013194 0.998870
v 0.009072 0.012106 0.998870
v 0.009184 0.010974 0.998870
v 0.009072 0.009843 0.998870
v 0.008742 0.008755 0.998870
v 0.008206 0.007752 0.998870
v 0.007485 0.006873 0.998870
v 0.006606 0.006152 0.998870
v 0.005603 0.005616 0.998870
v 0.004515 0.005286 0.998870
v 0.003384 0.005174 0.998870
v 0.002252 0.005286 0.998870
v 0.001164 0.005616 0.998870
v 0.000161 0.006152 0.998870
v -0.000717 0.006873 0.998870
v -0.001439 0.007752 0.998870
v -0.001975 0.008755 0.998870
v -0.002305 0.009843 0.998870
v -0.002416 0.010974 0.998870
v -0.002305 0.012106 0.998870
v -0.001975 0.013194 0.998870
v -0.001439 0.014197 0.998870
v -0.000718 0.015075 0.998870
v 0.000161 0.015797 0.998870
v 0.001164 0.016333 0.998870
v 0.002252 0.016663 0.998870
v 0.003384 0.010976 -1.001130
v 0.003384 0.010974 0.998870
usemtl
s off
f 65 1 2
f 66 34 33
f 65 2 3
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f 32 1 65
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f 1 33 34 2
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f 25 57 58 26
f 26 58 59 27
f 27 59 60 28
f 28 60 61 29
f 29 61 62 30
f 30 62 63 31
f 31 63 64 32
f 33 1 32 64
o Cylinder.001
v -0.996616 0.010976 -0.006930
v -0.996616 0.009844 -0.006819
v -0.996616 0.008756 -0.006489
v -0.996616 0.007753 -0.005953
v -0.996616 0.006874 -0.005231
v -0.996616 0.006153 -0.004353
v -0.996616 0.005617 -0.003350
v -0.996616 0.005287 -0.002262
v -0.996616 0.005176 -0.001130
v -0.996616 0.005287 0.000001
v -0.996616 0.005617 0.001089
v -0.996616 0.006153 0.002092
v -0.996616 0.006874 0.002971
v -0.996616 0.007753 0.003692
v -0.996616 0.008756 0.004228
v -0.996616 0.009844 0.004558
v -0.996616 0.010976 0.004670
v -0.996616 0.012107 0.004558
v -0.996616 0.013195 0.004228
v -0.996616 0.014198 0.003692
v -0.996616 0.015077 0.002971
v -0.996616 0.015798 0.002092
v -0.996616 0.016334 0.001089
v -0.996616 0.016664 0.000001
v -0.996616 0.016776 -0.001130
v -0.996616 0.016664 -0.002262
v -0.996616 0.016334 -0.003350
v -0.996616 0.015798 -0.004353
v -0.996616 0.015077 -0.005231
v -0.996616 0.014198 -0.005953
v -0.996616 0.013195 -0.006489
v -0.996616 0.012107 -0.006819
v 1.003384 0.010974 -0.006930
v 1.003384 0.009843 -0.006819
v 1.003384 0.008755 -0.006489
v 1.003384 0.007752 -0.005953
v 1.003384 0.006873 -0.005231
v 1.003384 0.006152 -0.004353
v 1.003384 0.005616 -0.003350
v 1.003384 0.005286 -0.002262
v 1.003384 0.005174 -0.001130
v 1.003384 0.005286 0.000001
v 1.003384 0.005616 0.001089
v 1.003384 0.006152 0.002092
v 1.003384 0.006873 0.002971
v 1.003384 0.007752 0.003692
v 1.003384 0.008755 0.004228
v 1.003384 0.009843 0.004558
v 1.003384 0.010974 0.004670
v 1.003384 0.012106 0.004558
v 1.003384 0.013194 0.004228
v 1.003384 0.014197 0.003692
v 1.003384 0.015076 0.002971
v 1.003384 0.015797 0.002092
v 1.003384 0.016333 0.001089
v 1.003384 0.016663 0.000001
v 1.003384 0.016774 -0.001130
v 1.003384 0.016663 -0.002262
v 1.003384 0.016333 -0.003350
v 1.003384 0.015797 -0.004352
v 1.003384 0.015076 -0.005231
v 1.003384 0.014197 -0.005953
v 1.003384 0.013194 -0.006489
v 1.003384 0.012106 -0.006819
v -0.996616 0.010976 -0.001130
v 1.003384 0.010974 -0.001130
usemtl
s off
f 131 67 68
f 132 100 99
f 131 68 69
f 132 101 100
f 131 69 70
f 132 102 101
f 131 70 71
f 132 103 102
f 131 71 72
f 132 104 103
f 131 72 73
f 132 105 104
f 131 73 74
f 132 106 105
f 131 74 75
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f 132 109 108
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f 132 113 112
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f 132 114 113
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f 131 83 84
f 132 116 115
f 131 84 85
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f 131 85 86
f 132 118 117
f 131 86 87
f 132 119 118
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f 132 120 119
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f 132 122 121
f 131 90 91
f 132 123 122
f 131 91 92
f 132 124 123
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f 132 125 124
f 131 93 94
f 132 126 125
f 131 94 95
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f 131 95 96
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f 132 129 128
f 131 97 98
f 132 130 129
f 98 67 131
f 132 99 130
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f 68 100 101 69
f 69 101 102 70
f 70 102 103 71
f 71 103 104 72
f 72 104 105 73
f 73 105 106 74
f 74 106 107 75
f 75 107 108 76
f 76 108 109 77
f 77 109 110 78
f 78 110 111 79
f 79 111 112 80
f 80 112 113 81
f 81 113 114 82
f 82 114 115 83
f 83 115 116 84
f 84 116 117 85
f 85 117 118 86
f 86 118 119 87
f 87 119 120 88
f 88 120 121 89
f 89 121 122 90
f 90 122 123 91
f 91 123 124 92
f 92 124 125 93
f 93 125 126 94
f 94 126 127 95
f 95 127 128 96
f 96 128 129 97
f 97 129 130 98
f 99 67 98 130
o Cylinder
v 0.000000 -1.000000 -0.005800
v 0.001132 -1.000000 -0.005689
v 0.002220 -1.000000 -0.005358
v 0.003222 -1.000000 -0.004822
v 0.004101 -1.000000 -0.004101
v 0.004822 -1.000000 -0.003222
v 0.005358 -1.000000 -0.002220
v 0.005689 -1.000000 -0.001132
v 0.005800 -1.000000 -0.000000
v 0.005689 -1.000000 0.001132
v 0.005358 -1.000000 0.002220
v 0.004822 -1.000000 0.003222
v 0.004101 -1.000000 0.004101
v 0.003222 -1.000000 0.004822
v 0.002220 -1.000000 0.005358
v 0.001132 -1.000000 0.005689
v -0.000000 -1.000000 0.005800
v -0.001132 -1.000000 0.005689
v -0.002220 -1.000000 0.005358
v -0.003222 -1.000000 0.004822
v -0.004101 -1.000000 0.004101
v -0.004822 -1.000000 0.003222
v -0.005358 -1.000000 0.002220
v -0.005689 -1.000000 0.001132
v -0.005800 -1.000000 -0.000000
v -0.005689 -1.000000 -0.001132
v -0.005358 -1.000000 -0.002220
v -0.004822 -1.000000 -0.003222
v -0.004101 -1.000000 -0.004101
v -0.003222 -1.000000 -0.004822
v -0.002220 -1.000000 -0.005358
v -0.001132 -1.000000 -0.005689
v 0.000000 1.000000 -0.005800
v 0.001132 1.000000 -0.005689
v 0.002220 1.000000 -0.005358
v 0.003222 1.000000 -0.004822
v 0.004101 1.000000 -0.004101
v 0.004822 1.000000 -0.003222
v 0.005358 1.000000 -0.002220
v 0.005689 1.000000 -0.001132
v 0.005800 1.000000 0.000000
v 0.005689 1.000000 0.001132
v 0.005358 1.000000 0.002220
v 0.004822 1.000000 0.003222
v 0.004101 1.000000 0.004101
v 0.003222 1.000000 0.004822
v 0.002220 1.000000 0.005358
v 0.001132 1.000000 0.005689
v 0.000000 1.000000 0.005800
v -0.001132 1.000000 0.005689
v -0.002220 1.000000 0.005358
v -0.003222 1.000000 0.004822
v -0.004101 1.000000 0.004101
v -0.004822 1.000000 0.003222
v -0.005358 1.000000 0.002220
v -0.005688 1.000000 0.001132
v -0.005800 1.000000 0.000000
v -0.005689 1.000000 -0.001131
v -0.005358 1.000000 -0.002220
v -0.004822 1.000000 -0.003222
v -0.004101 1.000000 -0.004101
v -0.003222 1.000000 -0.004822
v -0.002220 1.000000 -0.005358
v -0.001132 1.000000 -0.005688
v 0.000000 -1.000000 0.000000
v 0.000000 1.000000 0.000000
usemtl
s off
f 197 133 134
f 198 166 165
f 197 134 135
f 198 167 166
f 197 135 136
f 198 168 167
f 197 136 137
f 198 169 168
f 197 137 138
f 198 170 169
f 197 138 139
f 198 171 170
f 197 139 140
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f 197 141 142
f 198 174 173
f 197 142 143
f 198 175 174
f 197 143 144
f 198 176 175
f 197 144 145
f 198 177 176
f 197 145 146
f 198 178 177
f 197 146 147
f 198 179 178
f 197 147 148
f 198 180 179
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f 197 150 151
f 198 183 182
f 197 151 152
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f 198 185 184
f 197 153 154
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f 197 154 155
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f 198 188 187
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f 197 157 158
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f 164 133 197
f 198 165 196
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f 134 166 167 135
f 135 167 168 136
f 136 168 169 137
f 137 169 170 138
f 138 170 171 139
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f 140 172 173 141
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f 143 175 176 144
f 144 176 177 145
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f 152 184 185 153
f 153 185 186 154
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f 156 188 189 157
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f 159 191 192 160
f 160 192 193 161
f 161 193 194 162
f 162 194 195 163
f 163 195 196 164
f 165 133 164 196
.mtl 文件：
# Blender MTL File: 'cylxyzaxis.blend'
# Material Count: 1
newmtl
Ns 1.00000
Ka 0.000000 0.000000 0.000000
Kd 0.8 0.8 0.8
Ks 0.8 0.8 0.8
d 1
illum 2