Databases
StackOverflow2013
Postsdbo
POOpenGL ES2: Using FrameBuffer objects to render many shapes more quickly
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POOpenGL ES2: Using FrameBuffer objects to render many shapes more quickly
    primarykey
    data
    text
    <p>I've got a program that draws upwards of 90 2D shapes w/ textures which the user can pick up and drag by touching the screen. There is a noticeable amount of choppiness, and DDMS tells me that the one method that takes up the most CPU time (~85%) is the draw() method. Since only 1 shape is actually moving and the other 89 are not, would it be possible/faster to render the 89 shapes to a texture using a FrameBuffer object and draw that texture on a shape that fills up the whole screen? If not, are there any other potential ways of speeding things up?</p> <pre><code>private void draw() { // Pass in the position information mCubePositions.position(0); GLES20.glVertexAttribPointer(mPositionHandle, mPositionDataSize, GLES20.GL_FLOAT, false, 0, mCubePositions); GLES20.glEnableVertexAttribArray(mPositionHandle); // Pass in the color information mCubeColors.position(0); GLES20.glVertexAttribPointer(mColorHandle, mColorDataSize, GLES20.GL_FLOAT, false, 0, mCubeColors); GLES20.glEnableVertexAttribArray(mColorHandle); // Pass in the texture coordinate information mCubeTextureCoordinates.position(0); GLES20.glVertexAttribPointer(mTextureCoordinateHandle, mTextureCoordinateDataSize, GLES20.GL_FLOAT, false, 0, mCubeTextureCoordinates); GLES20.glEnableVertexAttribArray(mTextureCoordinateHandle); // This multiplies the view matrix by the model matrix, and stores the // result in the MVP matrix // (which currently contains model * view). Matrix.multiplyMM(mMVPMatrix, 0, mViewMatrix, 0, mModelMatrix, 0); // Pass in the modelview matrix. GLES20.glUniformMatrix4fv(mMVMatrixHandle, 1, false, mMVPMatrix, 0); // This multiplies the modelview matrix by the projection matrix, and // stores the result in the MVP matrix // (which now contains model * view * projection). Matrix.multiplyMM(mMVPMatrix, 0, mProjectionMatrix, 0, mMVPMatrix, 0); // Pass in the combined matrix. GLES20.glUniformMatrix4fv(mMVPMatrixHandle, 1, false, mMVPMatrix, 0); // Draw the cube. GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, 6); } </code></pre> <p>Thanks in advance.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USJon W
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload