public void execute(GL10 gl) {
float[] paleYellow = {1.0f, 1.0f, 0.3f, 1.0f};
float[] white = {1.0f, 1.0f, 1.0f, 1.0f};
float[] black = {0.0f, 0.0f, 0.0f, 0.0f};
float[] sunPos = {0.0f, 0.0f, 0.0f, 1.0f};
float sunWidth = 0.0f;
float sunScreenLoc[] = new float[4]; // xyz and radius
float earthScreenLoc[] = new float[4]; // xyz and radius
gl.glMatrixMode(GL10.GL_MODELVIEW);
gl.glShadeModel(GL10.GL_SMOOTH);
gl.glEnable(GL10.GL_LIGHTING);
gl.glEnable(GL10.GL_BLEND);
gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
gl.glPushMatrix();
gl.glTranslatef(
-m_Eyeposition[X_VALUE], -m_Eyeposition[Y_VALUE], -m_Eyeposition[Z_VALUE]); // 1
gl.glLightfv(SS_SUNLIGHT, GL10.GL_POSITION, makeFloatBuffer(sunPos));
gl.glEnable(SS_SUNLIGHT);
gl.glMaterialfv(GL10.GL_FRONT_AND_BACK, GL10.GL_EMISSION, makeFloatBuffer(paleYellow));
gl.glDisable(GL10.GL_DEPTH_TEST);
executePlanet(m_Sun, gl, false, sunScreenLoc);
gl.glEnable(GL10.GL_DEPTH_TEST);
gl.glMaterialfv(GL10.GL_FRONT_AND_BACK, GL10.GL_EMISSION, makeFloatBuffer(black));
gl.glPopMatrix();
if ((m_LensFlare != null) && (sunScreenLoc[Z_INDEX] > 0.0f)) {
CGPoint centerRelative = new CGPoint();
CGSize windowSize = new CGSize();
float sunsBodyWidth =
44.0f; // about the width of the sun's bady within the glare in the bitmap, in pixels.
float cx, cy;
float aspectRatio;
float scale = 0f;
DisplayMetrics display = myAppcontext.getResources().getDisplayMetrics();
windowSize.width = display.widthPixels;
windowSize.height = display.heightPixels;
cx = windowSize.width / 2.0f;
cy = windowSize.height / 2.0f;
aspectRatio = cx / cy;
centerRelative.x = sunScreenLoc[X_INDEX] - cx;
centerRelative.y = (cy - sunScreenLoc[Y_INDEX]) / aspectRatio;
scale =
CT.renderTextureAt(
gl,
centerRelative.x,
centerRelative.y,
0f,
windowSize,
m_FlareSource,
sunScreenLoc[RADIUS_INDEX],
1.0f,
1.0f,
1.0f,
1.0f);
sunWidth = scale * windowSize.width * sunsBodyWidth / 256.0f;
}
gl.glEnable(SS_FILLLIGHT2);
gl.glMatrixMode(GL10.GL_MODELVIEW);
gl.glPushMatrix();
gl.glTranslatef(-m_Eyeposition[X_VALUE], -m_Eyeposition[Y_VALUE], -m_Eyeposition[Z_VALUE]);
gl.glMaterialfv(GL10.GL_FRONT_AND_BACK, GL10.GL_DIFFUSE, makeFloatBuffer(white));
gl.glMaterialfv(GL10.GL_FRONT_AND_BACK, GL10.GL_SPECULAR, makeFloatBuffer(white));
executePlanet(m_Earth, gl, true, earthScreenLoc);
gl.glPopMatrix();
if ((m_LensFlare != null) && (sunScreenLoc[Z_INDEX] > 0)) {
float scale = 1.0f;
float delX = origwidth / 2.0f - sunScreenLoc[X_INDEX];
float delY = origheight / 2.0f - sunScreenLoc[Y_INDEX];
float grazeDist = earthScreenLoc[RADIUS_INDEX] + sunWidth;
float percentVisible = 1.0f;
float vanishDist = earthScreenLoc[RADIUS_INDEX] - sunWidth;
float distanceBetweenBodies = (float) sqrt(delX * delX + delY * delY);
if ((distanceBetweenBodies > vanishDist) && (distanceBetweenBodies < grazeDist)) {
percentVisible = (float) ((distanceBetweenBodies - vanishDist) / sunWidth);
if (percentVisible > 1.0) percentVisible = 1.0f;
else if (percentVisible < 0.3) percentVisible = .5f;
} else if (distanceBetweenBodies > grazeDist) {
percentVisible = 1.0f;
} else {
percentVisible = 0.0f;
}
scale = STANDARD_FOV / m_FieldOfView;
CGPoint source = new CGPoint();
source.x = sunScreenLoc[X_INDEX];
source.y = sunScreenLoc[Y_INDEX];
CGSize winsize = new CGSize();
winsize.width = origwidth;
winsize.height = origheight;
if (percentVisible > 0.0) {
m_LensFlare.execute(gl, winsize, source, scale, percentVisible);
}
}
}
