package core;

//directional light from the sun

public class sunLight {

public static int XZ_angle, YZ_angle;

public static float sinXZ_angle, cosXZ_angle, sinYZ_angle, cosYZ_angle;

public static vector position;

public static int[] shadowBuffer;

public static vector lightDirection;

public static int screen_width = mainThread.screen_width;

public static int screen_height = mainThread.screen_height;

public static int shadowmap_width = mainThread.shadowmap_width;

public static int shadowmap_size = shadowmap_width * shadowmap_width;

public static void init(){

shadowBuffer = new int[shadowmap_size];

XZ_angle = 225;

YZ_angle = 316;

sinXZ_angle = gameData.sin[XZ_angle];

cosXZ_angle = gameData.cos[XZ_angle];

sinYZ_angle = gameData.sin[YZ_angle];

cosYZ_angle = gameData.cos[YZ_angle];

lightDirection = new vector(0,0,1);

lightDirection.rotate_YZ(YZ_angle);

lightDirection.rotate_XZ(XZ_angle);

lightDirection.y*=-1;

lightDirection.x*=-1;

position = new vector(0,0,0);

}

public static void update(){

position.set(mainThread.my2Dto3DFactory.get3DLocation(mainThread.theAssetManager.Terrain.ground[0], screen_width/2, screen_height*13/32));

position.add(lightDirection, -5);

//reset shadow buffer

shadowBuffer[0] = Integer.MAX_VALUE;

for(int i = 1; i < shadowmap_size; i+=i){

System.arraycopy(shadowBuffer, 0, shadowBuffer, i, shadowmap_size - i >= i ? i : shadowmap_size - i);

}

}

}