如何在Vuforia Image Target示例中更改带有文本内容的茶壶?
该示例位于:https://developer.vuforia.com/resources/sample-apps/image-targets-sample-app
答案 0 :(得分:3)
我试图访问mbrenon给出的链接。不幸的是他们没有加载。
我的解决方案:
你有茶壶的原因是因为Vuforia正在使用该类作为要显示的图像。为了得到一个平面文本,我创建了自己的PlaneTextClass。
转到src-> main-> java-> com.qualcomm.vuforia.samples-> SampleApplication-> utils。在那里你可以找到你可以使用的对象。
添加一个名为“TextPlane”的类,并从“MeshObject”扩展
public class TextPlane extends MeshObject {
private final static double planeVertices[] =
{
-50f, -50f, 0.0f, 50f, -50f, 0.0f, 50f, 50f, 0.0f, -50f, 50f, 0.0f
};
private final static double planeTexcoords[] =
{
0, 0, 1, 0, 1, 1, 0, 1
};
private final static double planeNormals[] =
{
0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1
};
private final static short planeIndices[] =
{
0, 1, 2, 0, 2, 3
};
private Buffer mVertBuff;
private Buffer mTexCoordBuff;
private Buffer mNormBuff;
private Buffer mIndBuff;
public TextPlane(){
mVertBuff = fillBuffer(planeVertices);
mTexCoordBuff = fillBuffer(planeTexcoords);
mNormBuff = fillBuffer(planeNormals);
mIndBuff = fillBuffer(planeIndices);
}
@Override
public Buffer getBuffer(BUFFER_TYPE bufferType) {
Buffer result = null;
switch (bufferType)
{
case BUFFER_TYPE_VERTEX:
result = mVertBuff;
break;
case BUFFER_TYPE_TEXTURE_COORD:
result = mTexCoordBuff;
break;
case BUFFER_TYPE_INDICES:
result = mIndBuff;
break;
case BUFFER_TYPE_NORMALS:
result = mNormBuff;
default:
break;
}
return result;
}
@Override
public int getNumObjectVertex() {
return planeVertices.length / 3;
}
@Override
public int getNumObjectIndex() {
return planeIndices.length;
}}
如果要更改图像的大小,请更改PlaneVertices []中的值。
转到src-> main-> java-> com.qualcomm.vuforia.samples-> VuforiaSamples-> app-> ImageTargets-> ImageTargetRenderer.java
< / LI>在ImageTargetRenderer.java中添加新课程:
private TextPlane mTextPlane;
mTextPlane = new TextPlane();
替换它:
GLES20.glVertexAttribPointer(vertexHandle, 3, GLES20.GL_FLOAT,
false, 0, mTeapot.getVertices());
GLES20.glVertexAttribPointer(normalHandle, 3, GLES20.GL_FLOAT,
false, 0, mTeapot.getNormals());
GLES20.glVertexAttribPointer(textureCoordHandle, 2,
GLES20.GL_FLOAT, false, 0, mTeapot.getTexCoords());
用这个:
GLES20.glVertexAttribPointer(vertexHandle, 3, GLES20.GL_FLOAT,
false, 0, mTextPlane.getVertices());
GLES20.glVertexAttribPointer(normalHandle, 3, GLES20.GL_FLOAT,
false, 0, mTextPlane.getNormals());
GLES20.glVertexAttribPointer(textureCoordHandle, 2,
GLES20.GL_FLOAT, false, 0, mTextPlane.getTexCoords());
GLES20.glDrawElements(GLES20.GL_TRIANGLES,
mTeapot.getNumObjectIndex(), GLES20.GL_UNSIGNED_SHORT,
mTeapot.getIndices());
有了这个:
GLES20.glDrawElements(GLES20.GL_TRIANGLES,
mTextPlane.getNumObjectIndex(), GLES20.GL_UNSIGNED_SHORT,
mTextPlane.getIndices());