Allow Changing Render Distance

debian/client/common/usr/bin/minecraft-pi

@@ -22,12 +22,16 @@ export DOCKER_COMPOSE_YML="/usr/share/minecraft-pi/client/docker-compose.yml"
 
 # Ensure Features Are Selected
 if [ -z "${MCPI_FEATURES+x}" ]; then
-    MCPI_FEATURES="$(eval "zenity --class \"${ZENITY_CLASS}\" --list --checklist --width=600 --height=600 --column 'Enabled' --column 'Feature' ${AVAILABLE_FEATURES}")"
+    MCPI_FEATURES="$(eval "zenity --class \"${ZENITY_CLASS}\" --list --checklist --width 400 --height 400 --column 'Enabled' --column 'Feature' ${AVAILABLE_FEATURES}")"
+fi
+if [ -z "${MCPI_RENDER_DISTANCE+x}" ]; then
+    MCPI_RENDER_DISTANCE="$(zenity --class "${ZENITY_CLASS}" --list --radiolist --width 400 --height 400 --text 'Minecraft Render Distance:' --column 'Selected' --column 'Name' FALSE 'Far' FALSE 'Normal' TRUE 'Short' FALSE 'Tiny')"
 fi
 if [ -z "${MCPI_USERNAME+x}" ]; then
     MCPI_USERNAME="$(zenity --class "${ZENITY_CLASS}" --entry --text 'Minecraft Username:' --entry-text 'StevePi')"
 fi
 export MCPI_FEATURES
+export MCPI_RENDER_DISTANCE
 export MCPI_USERNAME
 
 # Allow X11 Connections From Root

debian/client/native/usr/share/minecraft-pi/client/docker-compose.yml

@@ -14,5 +14,6 @@ services:
             - 'HOME=/home'
             - 'DISPLAY=unix${DISPLAY}'
             - 'MCPI_FEATURES=${MCPI_FEATURES}'
+            - 'MCPI_RENDER_DISTANCE=${MCPI_RENDER_DISTANCE}'
             - 'MCPI_USERNAME=${MCPI_USERNAME}'
             - 'MCPI_MODE=native'

debian/client/virgl/usr/share/minecraft-pi/client/docker-compose.yml

@@ -13,5 +13,6 @@ services:
             - 'HOME=/home'
             - 'DISPLAY=unix${DISPLAY}'
             - 'MCPI_FEATURES=${MCPI_FEATURES}'
+            - 'MCPI_RENDER_DISTANCE=${MCPI_RENDER_DISTANCE}'
             - 'MCPI_USERNAME=${MCPI_USERNAME}'
             - 'MCPI_MODE=virgl'

mods/src/minecraft.h

@@ -115,6 +115,7 @@ static uint32_t Options_3d_anaglyph_property_offset = 0x15; // unsigned char / b
 static uint32_t Options_ambient_occlusion_property_offset = 0x18; // unsigned char / bool
 static uint32_t Options_hide_gui_property_offset = 0xec; // unsigned char / bool
 static uint32_t Options_third_person_property_offset = 0xed; // unsigned char / bool
+static uint32_t Options_render_distance_property_offset = 0x10; // int32_t
 
 // MouseBuildInput
 

mods/src/options/options.c

@@ -13,6 +13,24 @@ static uint32_t LevelData_getSpawnMobs_injection(__attribute__((unused)) unsigne
     return mob_spawning;
 }
 
+// Get Custom Render Distance
+static int get_render_distance() {
+    char *distance_str = getenv("MCPI_RENDER_DISTANCE");
+    if (distance_str == NULL) {
+        distance_str = "Short";
+    }
+    if (strcmp("Far", distance_str) == 0) {
+        return 0;
+    } else if (strcmp("Normal", distance_str) == 0) {
+        return 1;
+    } else if (strcmp("Short", distance_str) == 0) {
+        return 2;
+    } else if (strcmp("Tiny", distance_str) == 0) {
+        return 3;
+    } else {
+        ERR("Invalid Render Distance: %s", distance_str);
+    }
+}
 // Get Custom Username
 static char *get_username() {
     char *username = getenv("MCPI_USERNAME");
@@ -26,6 +44,7 @@ static int fancy_graphics;
 static int peaceful_mode;
 static int anaglyph;
 static int smooth_lighting;
+static int render_distance;
 // Configure Options
 static void Minecraft_init_injection(unsigned char *this) {
     // Call Original Method
@@ -42,6 +61,8 @@ static void Minecraft_init_injection(unsigned char *this) {
     *(options + Options_3d_anaglyph_property_offset) = anaglyph;
     // Smooth Lighting
     *(options + Options_ambient_occlusion_property_offset) = smooth_lighting;
+    // Render Distance
+    *(int32_t *) (options + Options_render_distance_property_offset) = render_distance;
 }
 
 // Enable Touch GUI
@@ -71,6 +92,13 @@ void init_options() {
     peaceful_mode = feature_has("Peaceful Mode");
     // 3D Anaglyph
     anaglyph = feature_has("3D Anaglyph");
+    // Render Distance
+    if (!is_server) {
+        render_distance = get_render_distance();
+        INFO("Setting Render Distance: %i", render_distance);
+    } else {
+        render_distance = 3;
+    }
 
     // Set Options
     overwrite_calls((void *) Minecraft_init, Minecraft_init_injection);