Databases
StackOverflow2013
Postsdbo
POOpenglES 2.0 PNG alpha texture overlap
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POOpenglES 2.0 PNG alpha texture overlap
    primarykey
    data
    text
    <p>I'm trying to draw multiple hexagons on the screen that have an alpha channel. the image is this:</p> <p><img src="https://i.stack.imgur.com/iPO7X.png" alt="http://img834.imageshack.us/img834/571/hexagon.png"></p> <p>So, I load the texture into the program and that's ok. When it runs, the alpha channel is blended with the background color and that's ok but, when two hexagons overlap themselves, the overlapped part becomes the color of the background! Below the picture:</p> <p><img src="https://i.stack.imgur.com/eqjYd.png" alt="http://img259.imageshack.us/img259/213/20120731163847.png"></p> <p>Of course, this is not the effect that I expected.. I want them to overlap without this background being drawn over the other texture. Here is my code for drawing:</p> <pre><code> GLES20.glUseProgram(Program); hVertex = GLES20.glGetAttribLocation(Program,"vPosition"); hColor = GLES20.glGetUniformLocation(Program, "vColor"); uTexture = GLES20.glGetUniformLocation(Program, "u_Texture"); hTexture = GLES20.glGetAttribLocation(Program, "a_TexCoordinate"); hMatrix = GLES20.glGetUniformLocation(Program, "uMVPMatrix"); GLES20.glVertexAttribPointer(hVertex, 3, GLES20.GL_FLOAT, false, 0, bVertex); GLES20.glEnableVertexAttribArray(hVertex); GLES20.glUniform4fv(hColor, 1, Color, 0); GLES20.glActiveTexture(GLES20.GL_TEXTURE0); GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, hTexture); GLES20.glUniform1i(uTexture, 0); GLES20.glVertexAttribPointer(hTexture, 2, GLES20.GL_FLOAT, false, 0, bTexture); GLES20.glEnableVertexAttribArray(hTexture); GLES20.glBlendFunc(GLES20.GL_ONE, GLES20.GL_ONE_MINUS_SRC_ALPHA); GLES20.glEnable(GLES20.GL_BLEND); x=-1;y=0;z=0; for (int i=0;i&lt;10;i++) { Matrix.setIdentityM(ModelMatrix, 0); Matrix.translateM(ModelMatrix, 0, x, y, z); x+=0.6f; Matrix.multiplyMM(ModelMatrix, 0, ModelMatrix, 0, ProjectionMatrix, 0); GLES20.glUniformMatrix4fv(hMatrix, 1, false, ModelMatrix, 0); GLES20.glDrawElements(GLES20.GL_TRIANGLES, DrawOrder.length, GLES20.GL_UNSIGNED_SHORT, bDrawOrder); } GLES20.glDisable(GLES20.GL_BLEND); GLES20.glDisableVertexAttribArray(hVertex); } </code></pre> <p>And My fragment shader:</p> <pre><code>public final String fragmentShaderCode = "precision mediump float;" + "uniform vec4 vColor;" + "uniform sampler2D u_Texture;" + "varying vec2 v_TexCoordinate;" + "void main() {" + " gl_FragColor = vColor * texture2D(u_Texture, v_TexCoordinate);" + "}"; </code></pre> <p>and my renderer code:</p> <pre><code> super(context); setEGLContextClientVersion(2); getHolder().setFormat(PixelFormat.TRANSLUCENT); setEGLConfigChooser(8, 8, 8, 8, 8, 8); renderer = new GLRenderer(context); setRenderer(renderer); </code></pre> <p>I already tried to use diferent functions on glBlendFunc but nothing seems to work.. Does Anyone knows what the problem is? I'm really lost.. If needs anymore code just ask!</p> <p>Thank you!</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USTim
    1. USrdnobrega
    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. VO
      singulars
      1. POOpenglES 2.0 PNG alpha texture overlap
      1. This table or related slice is empty.
      1. VTUpMod
    1. CODo you have depth test enabled by any chance?
      singulars
      1. POOpenglES 2.0 PNG alpha texture overlap
      1. USTim
    2. COYes, i do.. I'm enabling it on the onSurfaceCreated function. I'm thinking this migth have been on the blending but has no effect changing the blending type, the textures still overlap in this weird alpha.
      singulars
      1. POOpenglES 2.0 PNG alpha texture overlap
      1. USrdnobrega
 

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