Android texture fixed distance movement, android texture fixed Distance

Android texture fixed distance movement, android texture fixed Distance

: Move up and down the text bar on the right. If no text is displayed, it will automatically stop moving. This is different from the texture movement I wrote earlier. The previous movement is loop movement, and this time it is positioning and moving.

Vertex shader:

uniform mat4 uMVPMatrix;attribute vec3 aPosition;attribute vec2 aTexCoor;varying vec2 vTextureCoord;void main(){   gl_Position=uMVPMatrix*vec4(aPosition,1);   vTextureCoord=aTexCoor;}

Fragment coloring tool:

precision mediump float;varying vec2 vTextureCoord;uniform sampler2D sTexture;uniform float uSpan;void main(){   vec2 st_Result=vec2(0,0);   st_Result.x=vTextureCoord.x;   st_Result.y=vTextureCoord.y+uSpan;   gl_FragColor=texture2D(sTexture,st_Result);}

Java code: (here is the core)

Package com. hl. paints; import java. nio. byteBuffer; import java. nio. byteOrder; import java. nio. floatBuffer; import com. hl. utils. matrixState; import android. opengl. GLES20; public class functions {int mProgram; int functions; int maPositionHandle; int maTexCoorHandle; int muSpanHandle; FloatBuffer mVertexBuffer; FloatBuffer mTexCoorBuffer; int vCount = 0; public functions (float width, float height, float s, float t, int mProgram) {// TODO Auto-generated constructor stubinitVertex (width, height, s, t); initShader (mProgram );} private void initVertex (float width, float height, <span style = "color: # ff0000;"> float s, float t </span>) {// texture input, the purpose is to put the entire image into a rectangular box at the beginning, but a part of it // TODO Auto-generated method stubvCount = 6; float w = width/2; float h = height/2; float vertices [] = new float [] {-w, h, 0,-w,-h, 0, w,-h, 0, w, h, 0,-w, h, 0,}; ByteBuffer vbb = ByteBuffer. allocateDirect (vertices. length * 4); vbb. order (ByteOrder. nativeOrder (); mVertexBuffer = vbb. asFloatBuffer (); mVertexBuffer. put (vertices); mVertexBuffer. position (0); float texCoor [] = new float [] {0, 0, 0, t, s, 0, 0 }; byteBuffer cbb = ByteBuffer. allocateDirect (texCoor. length * 4); cbb. order (ByteOrder. nativeOrder (); mTexCoorBuffer = cbb. asFloatBuffer (); mTexCoorBuffer. put (texCoor); mTexCoorBuffer. position (0);} private void initShader (int mProgram) {// TODO Auto-generated method stubthis. mProgram = mProgram; histogram = average (mProgram, "uMVPMatrix"); maPositionHandle = average (mProgram, "aPosition"); maTexCoorHandle = average (mProgram, "aTexCoor "); muSpanHandle = aggregate (mProgram, "uSpan");} public void drawSelf (int texId, float currStart) {gles?gluseprogram (mProgram); Aggregate (muMVPMatrixHandle, 1, false, MatrixState. getFinalMatrix (), 0); Aggregate (maPositionHandle, 3, gles0000gl _ FLOAT, false, 3*4, mVertexBuffer); Aggregate (maTexCoorHandle, 2, gles0000gl _ FLOAT, false, 2*4, mTexCoorBuffer); Second (maPositionHandle); Second (second); Second (muSpanHandle, currStart); Second (gles‑gl _ TEXTURE0); Second (gles‑gl _ TEXTURE_2D, texId ); gles1_gldrawarrays (gles1_gl _ TRIANGLES, 0, vCount );}}

Code:

        private DrawRectMoveStop benRightText;        BUTTON_BEN_RIGHT3_WIDTH = 2.0f * ratio * 0.23f;BUTTON_BEN_RIGHT3_HEIGHT = 1.4f;BUTTON_BEN_RIGHT3_XOFFSET = ratio - 2.0f * ratio * 0.23f / 2;BUTTON_BEN_RIGHT3_YOFFSET = 1.0f - 0.15f - 0.37f - 0.02f - 0.7f;benRightText = new DrawRectMoveStop(BUTTON_BEN_RIGHT3_WIDTH, BUTTON_BEN_RIGHT3_HEIGHT,<span style="color:#ff0000;"> 1.0f, 0.7f</span>, ShaderManager.getMoveTextureShaderProgram());

// 1.0f and 0.7f are calculated based on the texture image and width. The text on the right is in the image format.

        <pre name="code" class="java">        MatrixState.pushMatrix();MatrixState.translate(BUTTON_BEN_RIGHT3_XOFFSET, BUTTON_BEN_RIGHT3_YOFFSET, 0);benRightText.drawSelf(rText[condition], textYOffset);MatrixState.popMatrix();

Private float textYOffset = 0;

        <span style="color:#ff0000;">if (UtilConfigArea.isInArea(x, y, AREA_BEN_RIGHT3)) {//onTouchEvent ACTION_MOVE:textYOffset -= dy * TOUCH_SCALE_FACTOR * 0.002f;if (textYOffset > 0.3f) {textYOffset = 0.3f;}if (textYOffset < 0.0f) {textYOffset = 0.0f;}}</span>

Note: Some methods are used in this article. As mentioned in my other blog posts, if you want to use them, please refer to relevant blog posts.