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2014/10/16 ¤W¤È 08:18:41
android Programming Glossary: matricesAndroid Image View Pinch Zooming http://stackoverflow.com/questions/10630373/android-image-view-pinch-zooming matrix ImageView and the variables used are These matrices will be used to move and zoom image Matrix matrix new Matrix..
Is Google's Android OpenGL tutorial teaching incorrect linear algebra? http://stackoverflow.com/questions/11925647/is-googles-android-opengl-tutorial-teaching-incorrect-linear-algebra the rotation is the last factor. The rule of thumb is that matrices are applied in right to left order and the rotation is applied..
Appropriate multiplication of matrices for rotation/translation http://stackoverflow.com/questions/11965593/appropriate-multiplication-of-matrices-for-rotation-translation multiplication of matrices for rotation translation In order to rotate translate object..
How do I determine what is touched in 3D space from the screen? http://stackoverflow.com/questions/2487710/how-do-i-determine-what-is-touched-in-3d-space-from-the-screen If you are doing 2D to 3D picking you need to fiddle with matrices and vectors a bit. GlUnproject does not exist for OpenGL ES..
How to use onSensorChanged sensor data in combination with OpenGL http://stackoverflow.com/questions/2881128/how-to-use-onsensorchanged-sensor-data-in-combination-with-opengl transpose rotationMatrix this assumes that the rotation matrices are multiplied in x y z order Rx Ry Rz resultingAngles 2 float.. transpose rotationMatrix this assumes that the rotation matrices are multiplied in z y x resultingAngles 2 float Math.asin rotationMatrix.. transpose rotationMatrix this assumes that the rotation matrices are multiplied in z x y note z axis looks good at this one resultingAngles..
Understanding the Use of ColorMatrix and ColorMatrixColorFilter to Modify a Drawable's Hue http://stackoverflow.com/questions/4354939/understanding-the-use-of-colormatrix-and-colormatrixcolorfilter-to-modify-a-draw @see links. Note that a lot more can be done with color matrices. Including inverting etc... public class ColorFilterGenerator..
Strange behavior with android orientation sensor http://stackoverflow.com/questions/5577334/strange-behavior-with-android-orientation-sensor . This video explains why see at 38 25. I use rotation matrices instead of Euler angles in my motion sensing application. Rotation.. of Euler angles in my motion sensing application. Rotation matrices http gentlenav.googlecode.com files DCMDraft2.pdf Rotation matrices.. http gentlenav.googlecode.com files DCMDraft2.pdf Rotation matrices work like a charm. Quaternions are also very popular and said..
zooming and dragging images using matrix in android http://stackoverflow.com/questions/5881778/zooming-and-dragging-images-using-matrix-in-android private static final String TAG Touch These matrices will be used to move and zoom image Matrix matrix new Matrix..
Rotate zoom drag image in android imageview http://stackoverflow.com/questions/5894736/rotate-zoom-drag-image-in-android-imageview private static final String TAG Touch These matrices will be used to move and zoom image Matrix matrix new Matrix..
Store orientation to an array - and compare http://stackoverflow.com/questions/6368618/store-orientation-to-an-array-and-compare measured and the first is not. Let's compute the cost matrices according to this paper subsection 2.1 D i j Dist i j MIN D.. between A i and B j . I simply used ABS A i B j . The cost matrices for this example For Array 1 we have 13 as score for Array 2.. vectors than orientations Euler angles rotation matrices quaternions as tc pointed that out. If you are using acceleration..
http://stackoverflow.com/questions/6699387/android-opengl-3d-picking following global variables mg a MatrixGrabber with current matrices viewport a float 4 with the viewport x y width height The variables.. like that. gluProject sets it to 1 before applying matrices so it needs to be 1 when you're done undoing them. Long story..
Problem with getFloatv function in GL11 (Android) http://stackoverflow.com/questions/7125557/problem-with-getfloatv-function-in-gl11-android effect if this is the case. The solution is to handle the matrices yourself so there's no need to retrieve them from OpenGL in..
How to enable the (two finger) zoom in/out feature for an image in android [duplicate] http://stackoverflow.com/questions/7582833/how-to-enable-the-two-finger-zoom-in-out-feature-for-an-image-in-android see this private static final String TAG Touch These matrices will be used to move and zoom image Matrix matrix new Matrix..
Android Image View Pinch Zooming http://stackoverflow.com/questions/10630373/android-image-view-pinch-zooming android background @drawable enhanceimageframe android scaleType matrix ImageView and the variables used are These matrices will be used to move and zoom image Matrix matrix new Matrix Matrix savedMatrix new Matrix We can be in one of these 3 states..
Is Google's Android OpenGL tutorial teaching incorrect linear algebra? http://stackoverflow.com/questions/11925647/is-googles-android-opengl-tutorial-teaching-incorrect-linear-algebra the order of the factors should also be reversed so that the rotation is the last factor. The rule of thumb is that matrices are applied in right to left order and the rotation is applied first it's the the M part of MVP so it needs to be the rightmost..
Appropriate multiplication of matrices for rotation/translation http://stackoverflow.com/questions/11965593/appropriate-multiplication-of-matrices-for-rotation-translation multiplication of matrices for rotation translation In order to rotate translate object rotation only about z axis and translation only in xy plane..
How do I determine what is touched in 3D space from the screen? http://stackoverflow.com/questions/2487710/how-do-i-determine-what-is-touched-in-3d-space-from-the-screen do this android opengl es share improve this question If you are doing 2D to 3D picking you need to fiddle with matrices and vectors a bit. GlUnproject does not exist for OpenGL ES 1.1 so you have to do some math by yourself. Ray object intersection..
How to use onSensorChanged sensor data in combination with OpenGL http://stackoverflow.com/questions/2881128/how-to-use-onsensorchanged-sensor-data-in-combination-with-opengl rotationMatrix null accelGData magnetData rotationMatrix transpose rotationMatrix this assumes that the rotation matrices are multiplied in x y z order Rx Ry Rz resultingAngles 2 float Math.asin rotationMatrix 2 final float cosB float Math.cos.. rotationMatrix null accelGData magnetData rotationMatrix transpose rotationMatrix this assumes that the rotation matrices are multiplied in z y x resultingAngles 2 float Math.asin rotationMatrix 8 final float cosB float Math.cos resultingAngles.. rotationMatrix null accelGData magnetData rotationMatrix transpose rotationMatrix this assumes that the rotation matrices are multiplied in z x y note z axis looks good at this one resultingAngles 1 float Math.asin rotationMatrix 9 final float..
Understanding the Use of ColorMatrix and ColorMatrixColorFilter to Modify a Drawable's Hue http://stackoverflow.com/questions/4354939/understanding-the-use-of-colormatrix-and-colormatrixcolorfilter-to-modify-a-draw on websites. Credits goes to the original author from the @see links. Note that a lot more can be done with color matrices. Including inverting etc... public class ColorFilterGenerator Creates a HUE ajustment ColorFilter @see http groups.google.com..
Strange behavior with android orientation sensor http://stackoverflow.com/questions/5577334/strange-behavior-with-android-orientation-sensor of it as long as you are using yaw pitch and roll Euler angles . This video explains why see at 38 25. I use rotation matrices instead of Euler angles in my motion sensing application. Rotation matrices http gentlenav.googlecode.com files DCMDraft2.pdf.. explains why see at 38 25. I use rotation matrices instead of Euler angles in my motion sensing application. Rotation matrices http gentlenav.googlecode.com files DCMDraft2.pdf Rotation matrices work like a charm. Quaternions are also very popular.. angles in my motion sensing application. Rotation matrices http gentlenav.googlecode.com files DCMDraft2.pdf Rotation matrices work like a charm. Quaternions are also very popular and said to be the most stable. This answer was copied from here ...
zooming and dragging images using matrix in android http://stackoverflow.com/questions/5881778/zooming-and-dragging-images-using-matrix-in-android public class Touch extends Activity implements OnTouchListener private static final String TAG Touch These matrices will be used to move and zoom image Matrix matrix new Matrix Matrix savedMatrix new Matrix We can be in one of these 3 states..
Rotate zoom drag image in android imageview http://stackoverflow.com/questions/5894736/rotate-zoom-drag-image-in-android-imageview public class RotateZoomMove extends Activity implements OnTouchListener private static final String TAG Touch These matrices will be used to move and zoom image Matrix matrix new Matrix Matrix savedMatrix new Matrix We can be in one of these 3 states..
Store orientation to an array - and compare http://stackoverflow.com/questions/6368618/store-orientation-to-an-array-and-compare measured Obviously the second array is similar to the newly measured and the first is not. Let's compute the cost matrices according to this paper subsection 2.1 D i j Dist i j MIN D i 1 j D i j 1 D i 1 j 1 Here D i j is the i j element of the.. are comparing arrays A and B then Dist i j is the distance between A i and B j . I simply used ABS A i B j . The cost matrices for this example For Array 1 we have 13 as score for Array 2 we have 5. The lower score wins so the most similar array is.. North matter I guess not. It is far easier to compare the acceleration vectors than orientations Euler angles rotation matrices quaternions as tc pointed that out. If you are using acceleration data you have 3 dimensional vectors at each time point..
http://stackoverflow.com/questions/6699387/android-opengl-3d-picking 1 fNear 1 distance 1 fNear 1 fFar It currently assumes the following global variables mg a MatrixGrabber with current matrices viewport a float 4 with the viewport x y width height The variables it takes are equivalent to the ones that gluUnProject.. the resulting vector which kinda normalizes the vector or something like that. gluProject sets it to 1 before applying matrices so it needs to be 1 when you're done undoing them. Long story short you can actually use gluUnProject but you need to pass..
Problem with getFloatv function in GL11 (Android) http://stackoverflow.com/questions/7125557/problem-with-getfloatv-function-in-gl11-android
How to enable the (two finger) zoom in/out feature for an image in android [duplicate] http://stackoverflow.com/questions/7582833/how-to-enable-the-two-finger-zoom-in-out-feature-for-an-image-in-android Thanks Raj android image zoom share improve this question see this private static final String TAG Touch These matrices will be used to move and zoom image Matrix matrix new Matrix Matrix savedMatrix new Matrix We can be in one of these 3 states..
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