Better previews

core/src/mindustry/graphics/PlanetMesh.java

@@ -43,6 +43,12 @@ public class PlanetMesh{
         generateMesh();
     }
 
+    public @Nullable Vec3 intersect(Ray ray){
+        boolean found = Intersector3D.intersectRaySphere(ray, center, radius, Tmp.v33);
+        if(!found) return null;
+        return Tmp.v33;
+    }
+
     /** @return the sector that is hit by this ray, or null if nothing intersects it. */
     public @Nullable Ptile getTile(Ray ray){
         boolean found = Intersector3D.intersectRaySphere(ray, center, radius, Tmp.v33);
@@ -51,10 +57,15 @@ public class PlanetMesh{
     }
 
     public void render(Mat3D mat){
-        Shaders.planet.begin();
-        Shaders.planet.setUniformMatrix4("u_projModelView", mat.val);
-        mesh.render(Shaders.planet, lines ? Gl.lines : Gl.triangles);
-        Shaders.planet.end();
+        render(mat, Shaders.planet);
+    }
+
+    public void render(Mat3D mat, Shader shader){
+        shader.begin();
+        shader.setUniformMatrix4("u_projModelView", mat.val);
+        shader.apply();
+        mesh.render(shader, lines ? Gl.lines : Gl.triangles);
+        shader.end();
     }
 
     private void generateMesh(){

core/src/mindustry/graphics/Shaders.java

@@ -4,6 +4,7 @@ import arc.Core;
 import arc.graphics.Color;
 import arc.graphics.g2d.TextureRegion;
 import arc.graphics.gl.Shader;
+import arc.math.geom.*;
 import arc.scene.ui.layout.Scl;
 import arc.util.ArcAnnotate.*;
 import arc.util.Time;
@@ -18,6 +19,7 @@ public class Shaders{
     public static LightShader light;
     public static SurfaceShader water, tar, slag;
     public static Shader planet;
+    public static PlanetGridShader planetGrid;
 
     public static void init(){
         shadow = new Shadow();
@@ -37,6 +39,20 @@ public class Shaders{
         tar = new SurfaceShader("tar");
         slag = new SurfaceShader("slag");
         planet = new LoadShader("planet", "planet");
+        planetGrid = new PlanetGridShader();
+    }
+
+    public static class PlanetGridShader extends LoadShader{
+        public Vec3 mouse = new Vec3();
+
+        public PlanetGridShader(){
+            super("planetgrid", "planetgrid");
+        }
+
+        @Override
+        public void apply(){
+            setUniformf("u_mouse", mouse);
+        }
     }
 
     public static class LightShader extends LoadShader{