@Override
public void onDrawFrame(GL10 unused) {
GLES20.glClearColor(0f, 0f, 0f, 0f);
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT);
if (mShaderCompilerSupport[0] == false) {
return;
}
GLES20.glDisable(GLES20.GL_DEPTH_TEST);
GLES20.glEnable(GLES20.GL_BLEND);
GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE_MINUS_SRC_ALPHA);
float angle = (SystemClock.uptimeMillis() % 5000) / 5000f * 360;
Matrix.setRotateM(mMatrixModel, 0, angle, 1, 2, 0);
Matrix.multiplyMM(mMatrixModelViewProjection, 0, mMatrixView, 0, mMatrixModel, 0);
Matrix.multiplyMM(
mMatrixModelViewProjection, 0, mMatrixProjection, 0, mMatrixModelViewProjection, 0);
mShaderSpline.useProgram();
GLES20.glUniformMatrix4fv(
mShaderSpline.getHandle("uModelViewProjectionM"), 1, false, mMatrixModelViewProjection, 0);
GLES20.glVertexAttribPointer(
mShaderSpline.getHandle("aPosition"), 2, GLES20.GL_FLOAT, false, 0, mBufferSpline);
GLES20.glEnableVertexAttribArray(mShaderSpline.getHandle("aPosition"));
for (float[] ctrl : mSplines) {
GLES20.glUniform3fv(mShaderSpline.getHandle("uCtrl"), 4, ctrl, 0);
GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, COUNT_VERTICES);
}
}
@Override
public void onDrawFrame(GL10 unused) {
GLES20.glClearColor(0f, 0f, 0f, 1f);
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
if (mShaderCompilerSupport[0] == false) {
return;
}
GLES20.glEnable(GLES20.GL_BLEND);
GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE_MINUS_SRC_ALPHA);
long time = SystemClock.uptimeMillis();
if (mLastRenderTime == -1) {
for (Star star : mStarArray) {
star.randomize();
star.mPosition[2] = (float) (Math.random() * 4 - 2);
}
mLastRenderTime = time;
}
float t = (time - mLastRenderTime) / 1000f;
mLastRenderTime = time;
mShaderStar.useProgram();
GLES20.glUniformMatrix4fv(
mShaderStar.getHandle("uModelViewProjectionM"), 1, false, mMatrixModelViewProjection, 0);
GLES20.glUniform1f(mShaderStar.getHandle("uSize"), .01f);
GLES20.glVertexAttribPointer(
mShaderStar.getHandle("aPosition"), 2, GLES20.GL_BYTE, false, 0, mBufferVertices);
GLES20.glEnableVertexAttribArray(mShaderStar.getHandle("aPosition"));
for (Star star : mStarArray) {
star.mPosition[2] += star.mSpeed * t;
if (star.mPosition[2] > 2) {
star.randomize();
}
}
Arrays.sort(
mStarArray,
new Comparator<Star>() {
@Override
public int compare(Star arg0, Star arg1) {
return arg0.mPosition[2] < arg1.mPosition[2] ? -1 : 1;
}
});
for (Star star : mStarArray) {
GLES20.glUniform3fv(mShaderStar.getHandle("uPosition"), 1, star.mPosition, 0);
GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
}
GLES20.glDisable(GLES20.GL_BLEND);
}
@Override
public void onSurfaceCreated(GL10 unused, EGLConfig config) {
// Check if shader compiler is supported.
GLES20.glGetBooleanv(GLES20.GL_SHADER_COMPILER, mShaderCompilerSupport, 0);
// If not, show user an error message and return immediately.
if (!mShaderCompilerSupport[0]) {
String msg = getContext().getString(R.string.error_shader_compiler);
showError(msg);
return;
}
try {
String vertexSource = loadRawString(R.raw.spline_vs);
String fragmentSource = loadRawString(R.raw.spline_fs);
mShaderSpline.setProgram(vertexSource, fragmentSource);
} catch (Exception ex) {
showError(ex.getMessage());
}
}
