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POAndroid OPENGL2 not drawing texture to quad
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  1. POAndroid OPENGL2 not drawing texture to quad
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    copied!<p>I'm trying to get some textures rendered on quads, but the screen turns out empty. (Open GL 2.0) I formerly used a static color shader on the quads, and the quads did appear on screen, so the positioning is fine.</p> <p>UPDATE: Now I can see black textures only...</p> <p>Here is my code:</p> <p>Vertex Shader:</p> <pre><code>uniform mat4 uTMatrix; uniform mat4 uMVPMatrix; attribute vec4 vPosition; attribute vec4 vTex; attribute vec4 inputTextureCoordinate; varying vec2 TexCoord0; void main(){ TexCoord0 = inputTextureCoordinate.xy; gl_Position = uMVPMatrix * uTMatrix * vPosition; } </code></pre> <p>Frag Shader:</p> <pre><code>varying highp vec2 TexCoord0; uniform sampler2D colorMap; void main(){ gl_FragColor = texture2D(colorMap, TexCoord0); } </code></pre> <p>onDrawFrame():</p> <pre><code> Matrix.multiplyMM(mMVPMatrix, 0, mProjMatrix, 0, mVMatrix, 0); GLES20.glUniformMatrix4fv(muMVPMatrixHandle, 1, false, mMVPMatrix, 0); GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT); GLES20.glUseProgram(mProgram); final float halfw = mWidth / 2f; final int rowHeight = mRowHeight; final float r = (float) rowHeight / halfw; int i = mFirstRow; final float initial = (float) ((i * rowHeight) - mScroll) / halfw; Matrix.setIdentityM(mTMatrix, 0); Matrix.translateM(mTMatrix, 0, 0, -initial, 0); GLES20.glFrontFace(GLES20.GL_CW); GLES20.glVertexAttribPointer(maPositionHandle, 3, GLES20.GL_FLOAT, false, 0, mVertBuffer); GLES20.glEnableVertexAttribArray(maPositionHandle); GLES20.glVertexAttribPointer(maTexHandle, 3, GLES20.GL_FLOAT, false, 0, mTexBuffer); GLES20.glEnableVertexAttribArray(maTexHandle); GLES20.glActiveTexture(GLES20.GL_TEXTURE0); GLES20.glEnable(GLES20.GL_TEXTURE_2D); final int l = mLastRow; for (; i &lt;= l; i++) { if (\*A check to see if the bitmap is cached*\) { GLES20.glUniform1i(muTextureHandle, i); GLES20.glUniformMatrix4fv(muTMatrixHandle, 1, false, mTMatrix, 0); GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4); } Matrix.translateM(mTMatrix, 0, 0, -r, 0); } GLES20.glDisableVertexAttribArray(maPositionHandle); GLES20.glDisableVertexAttribArray(maTexHandle); </code></pre> <p>loadTexture:</p> <pre><code> public void loadTexture(GL10 gl, Context c) { int[] texture = new int[1]; texture[0] = mRow; GLES20.glDeleteTextures(1, texture, 0); texture[0] = mRow; GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, texture[0]); // Create Nearest Filtered Texture GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST); GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR); // Different possible texture parameters, e.g. // GLES20.GL_CLAMP_TO_EDGE GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_REPEAT); GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_REPEAT); Bitmap bitmap = mBitmap; if (bitmap == null) { bitmap = mEmptyBitmap; } GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, bitmap, 0); } </code></pre>
 

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