我打算构建一个Android应用程序。基于增强现实。我用谷歌搜索并搜索了 SO，但没有发现任何非常有用的东西。
我想要做的是当应用程序启动时，它会启动它的相机并开始扫描图案。如果在任何情况下模式与本地数据库中存在的预定义模式匹配，它应该执行特定操作。
我参考了本教程
当我使用以下代码时，这些文件会在 sdcard 上创建：patt.hiro, android.patt, barcode.patt.
在打开.patt文件时，有一个由 0-255 之间的值组成的矩阵。如何通过资产而不是这些文件使用自定义模式？
CustomActivity.java
public class CustomActivity extends AndARActivity {
CustomObject someObject;
ARToolkit artoolkit;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
CustomRenderer renderer = new CustomRenderer();
super.setNonARRenderer(renderer);
try { // register a object for each marker type
artoolkit = super.getArtoolkit();
someObject = new CustomObject("test", "patt.hiro", 80.0,
new double[] { 0, 0 });
artoolkit.registerARObject(someObject);
someObject = new CustomObject("test", "android.patt", 80.0,
new double[] { 0, 0 });
artoolkit.registerARObject(someObject);
someObject = new CustomObject("test", "barcode.patt", 80.0,
new double[] { 0, 0 });
artoolkit.registerARObject(someObject);
} catch (AndARException ex) {
}
startPreview();
}
}
自定义对象.java
/** An example of an AR object being drawn on a marker. */
public class CustomObject extends ARObject {
public CustomObject(String name, String patternName, double markerWidth,
double[] markerCenter) {
super(name, patternName, markerWidth, markerCenter);
float mat_ambientf[] = { 0f, 1.0f, 0f, 1.0f };
float mat_flashf[] = { 0f, 1.0f, 0f, 1.0f };
float mat_diffusef[] = { 0f, 1.0f, 0f, 1.0f };
float mat_flash_shinyf[] = { 50.0f };
mat_ambient = GraphicsUtil.makeFloatBuffer(mat_ambientf);
mat_flash = GraphicsUtil.makeFloatBuffer(mat_flashf);
mat_flash_shiny = GraphicsUtil.makeFloatBuffer(mat_flash_shinyf);
mat_diffuse = GraphicsUtil.makeFloatBuffer(mat_diffusef);
}
public CustomObject(String name, String patternName, double markerWidth,
double[] markerCenter, float[] customColor) {
super(name, patternName, markerWidth, markerCenter);
float mat_flash_shinyf[] = { 50.0f };
mat_ambient = GraphicsUtil.makeFloatBuffer(customColor);
mat_flash = GraphicsUtil.makeFloatBuffer(customColor);
mat_flash_shiny = GraphicsUtil.makeFloatBuffer(mat_flash_shinyf);
mat_diffuse = GraphicsUtil.makeFloatBuffer(customColor);
}
/** Just a box, imported from the AndAR project. */
private SimpleBox box = new SimpleBox();
private FloatBuffer mat_flash;
private FloatBuffer mat_ambient;
private FloatBuffer mat_flash_shiny;
private FloatBuffer mat_diffuse;
/** Everything drawn here will be drawn directly onto the marker, as the
corresponding translation matrix will already be applied. */
@Override
public final void draw(GL10 gl) {
super.draw(gl);
gl.glMaterialfv(GL10.GL_FRONT_AND_BACK, GL10.GL_SPECULAR, mat_flash);
gl.glMaterialfv(GL10.GL_FRONT_AND_BACK, GL10.GL_SHININESS,
mat_flash_shiny);
gl.glMaterialfv(GL10.GL_FRONT_AND_BACK, GL10.GL_DIFFUSE, mat_diffuse);
gl.glMaterialfv(GL10.GL_FRONT_AND_BACK, GL10.GL_AMBIENT, mat_ambient);
// draw cube
gl.glColor4f(0, 1.0f, 0, 1.0f);
gl.glTranslatef(0.0f, 0.0f, 12.5f);
// draw the box
box.draw(gl);
}
@Override
public void init(GL10 gl) {}
}
自定义渲染器.java
/** A custom OpenGL renderer, that gets registered to the {@link AndARRenderer}. It allows you to draw non Augmented Reality stuff, and setup the OpenGL environment.*/
public class CustomRenderer implements OpenGLRenderer {
/** Light definitions */
private float[] ambientlight1 = { .3f, .3f, .3f, 1f };
private float[] diffuselight1 = { .7f, .7f, .7f, 1f };
private float[] specularlight1 = { 0.6f, 0.6f, 0.6f, 1f };
private float[] lightposition1 = { 20.0f, -40.0f, 100.0f, 1f };
private FloatBuffer lightPositionBuffer1 = GraphicsUtil
.makeFloatBuffer(lightposition1);
private FloatBuffer specularLightBuffer1 = GraphicsUtil
.makeFloatBuffer(specularlight1);
private FloatBuffer diffuseLightBuffer1 = GraphicsUtil
.makeFloatBuffer(diffuselight1);
private FloatBuffer ambientLightBuffer1 = GraphicsUtil
.makeFloatBuffer(ambientlight1);
/** Do non Augmented Reality stuff here. Will be called once after all AR objects have been drawn. The transformation matrices may have to be reset.*/
public final void draw(GL10 gl) {
}
/**Directly called before each object is drawn. Used to setup lighting and other OpenGL specific things.*/
public final void setupEnv(GL10 gl) {
gl.glEnable(GL10.GL_LIGHTING);
gl.glLightfv(GL10.GL_LIGHT1, GL10.GL_AMBIENT, ambientLightBuffer1);
gl.glLightfv(GL10.GL_LIGHT1, GL10.GL_DIFFUSE, diffuseLightBuffer1);
gl.glLightfv(GL10.GL_LIGHT1, GL10.GL_SPECULAR, specularLightBuffer1);
gl.glLightfv(GL10.GL_LIGHT1, GL10.GL_POSITION, lightPositionBuffer1);
gl.glEnable(GL10.GL_LIGHT1);
gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
gl.glDisable(GL10.GL_TEXTURE_2D);
initGL(gl);
}
/** Called once when the OpenGL Surface was created. */
public final void initGL(GL10 gl) {
gl.glDisable(GL10.GL_COLOR_MATERIAL);
gl.glEnable(GL10.GL_CULL_FACE);
gl.glShadeModel(GL10.GL_SMOOTH);
gl.glDisable(GL10.GL_COLOR_MATERIAL);
gl.glEnable(GL10.GL_LIGHTING);
gl.glEnable(GL10.GL_CULL_FACE);
gl.glEnable(GL10.GL_DEPTH_TEST);
gl.glEnable(GL10.GL_NORMALIZE);
}
}
如何从相机的聚焦区域捕捉图案以及如何将其与另一个图案匹配？
我知道我在这个问题上有点不清楚，但由于我是 android 开发的新手，任何建议都会有很大帮助。