@Override
public void onDrawFrame(GL10 glUnused) {
GLES20.glClear(GLES20.GL_DEPTH_BUFFER_BIT | GLES20.GL_COLOR_BUFFER_BIT);
// Set our per-vertex lighting program.
GLES20.glUseProgram(mPerVertexProgramHandle);
// Set program handles for cube drawing.
mMVPMatrixHandle = GLES20.glGetUniformLocation(mPerVertexProgramHandle, "u_MVPMatrix");
mMVMatrixHandle = GLES20.glGetUniformLocation(mPerVertexProgramHandle, "u_MVMatrix");
mLightPosHandle = GLES20.glGetUniformLocation(mPerVertexProgramHandle, "u_LightPos");
mPositionHandle = GLES20.glGetAttribLocation(mPerVertexProgramHandle, "a_Position");
mColorHandle = GLES20.glGetAttribLocation(mPerVertexProgramHandle, "a_Color");
mNormalHandle = GLES20.glGetAttribLocation(mPerVertexProgramHandle, "a_Normal");
mTextureCoordinateHandle =
GLES20.glGetAttribLocation(mPerVertexProgramHandle, "a_TexCoordinate");
// Set the active texture unit to texture unit 0.
GLES20.glEnable(GLES20.GL_TEXTURE_2D);
// Bind the texture to this unit.
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureArray.get(0));
drawPlane(this.mGroundVertices, this.mGroundColors, this.mGroundNormals, mGroundTextures);
// bind the next texture
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureArray.get(1));
drawPlane(this.mOceanVertices, this.mOceanColors, this.mOceanNormals, mOceanTextures);
// bind the next texture
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureArray.get(3));
drawCube();
// Get changes in finger positions and add to total for moving and rotating
totalDiffX += diffX;
totalDiffY += diffY;
angleX += dx;
angleY += dy;
// to prevent the user from looking more than straight up and less and straight down.
if (Math.abs(angleY) > 1.5f) {
angleY -= dy;
}
// move the model matrix by finger distance changes for pinch zoom movement.
Matrix.translateM(mModelMatrix, 0, this.diffX, this.diffY, 0);
// rotate camera based on finger movements
this.mCamera.look.x = (float) Math.cos(angleX);
this.mCamera.look.y = (float) Math.sin(angleX);
this.mCamera.look.z = (float) Math.tan(angleY);
updateLookAt();
// reset variables so that movement stops after finger movement stops
this.dx = 0;
this.dy = 0;
this.diffX = 0;
this.diffY = 0;
// update the lookAt coordinates
updateLookAt();
// redraw each object in the array.
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureArray.get(2));
synchronized (this.objects) {
for (Prim p : this.objects) {
p.draw(
this.mPositionHandle,
this.mColorHandle,
this.mNormalHandle,
this.mTextureCoordinateHandle);
}
}
GLES20.glDisable(GLES20.GL_TEXTURE_2D);
}
