Sun + dynamic lighting
This commit is contained in:
Anuken
@@ -0,0 +1,61 @@
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package mindustry.graphics.g3d;
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import arc.graphics.*;
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import arc.graphics.VertexAttributes.*;
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import arc.graphics.gl.*;
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import arc.math.geom.*;
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import arc.util.*;
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import mindustry.graphics.*;
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public class GenericMesh{
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protected final float[] floats = new float[3 + 3 + 1];
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protected final int primitiveType;
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protected final Mesh mesh;
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public GenericMesh(int vertices, int primitiveType){
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this.primitiveType = primitiveType;
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mesh = new Mesh(true, vertices, 0,
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new VertexAttribute(Usage.position, 3, Shader.positionAttribute),
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new VertexAttribute(Usage.normal, 3, Shader.normalAttribute),
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new VertexAttribute(Usage.colorPacked, 4, Shader.colorAttribute)
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);
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mesh.getVerticesBuffer().limit(mesh.getMaxVertices());
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mesh.getVerticesBuffer().position(0);
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}
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public void render(Mat3D mat){
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render(mat, Shaders.planet);
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}
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public void render(Mat3D mat, Shader shader){
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shader.begin();
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shader.setUniformMatrix4("u_projModelView", mat.val);
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shader.apply();
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mesh.render(shader, primitiveType);
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shader.end();
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}
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protected Vec3 normal(Vec3 v1, Vec3 v2, Vec3 v3){
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return Tmp.v32.set(v2).sub(v1).crs(v3.x - v1.x, v3.y - v1.y, v3.z - v1.z).nor();
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}
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protected void verts(Vec3 a, Vec3 b, Vec3 c, Vec3 normal, Color color){
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vert(a, normal, color);
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vert(b, normal, color);
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vert(c, normal, color);
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}
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protected void vert(Vec3 a, Vec3 normal, Color color){
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floats[0] = a.x;
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floats[1] = a.y;
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floats[2] = a.z;
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floats[3] = normal.x;
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floats[4] = normal.y;
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floats[5] = normal.z;
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floats[6] = color.toFloatBits();
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mesh.getVerticesBuffer().put(floats);
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}
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}
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@@ -0,0 +1,266 @@
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package mindustry.graphics.g3d;
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import arc.math.*;
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import arc.math.geom.*;
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import arc.util.*;
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//TODO clean this up somehow
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public class PlanetGrid{
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private static final PlanetGrid[] cache = new PlanetGrid[10];
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private static final float x = -0.525731112119133606f;
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private static final float z = -0.850650808352039932f;
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private static final Vec3[] iTiles = {
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new Vec3(-x, 0, z), new Vec3(x, 0, z), new Vec3(-x, 0, -z), new Vec3(x, 0, -z),
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new Vec3(0, z, x), new Vec3(0, z, -x), new Vec3(0, -z, x), new Vec3(0, -z, -x),
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new Vec3(z, x, 0), new Vec3(-z, x, 0), new Vec3(z, -x, 0), new Vec3(-z, -x, 0)
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};
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private static final int[][] iTilesP = {
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{9, 4, 1, 6, 11}, {4, 8, 10, 6, 0}, {11, 7, 3, 5, 9}, {2, 7, 10, 8, 5},
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{9, 5, 8, 1, 0}, {2, 3, 8, 4, 9}, {0, 1, 10, 7, 11}, {11, 6, 10, 3, 2},
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{5, 3, 10, 1, 4}, {2, 5, 4, 0, 11}, {3, 7, 6, 1, 8}, {7, 2, 9, 0, 6}
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};
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public final int size;
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public final Ptile[] tiles;
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public final Corner[] corners;
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public final Edge[] edges;
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PlanetGrid(int size){
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this.size = size;
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tiles = new Ptile[tileCount(size)];
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for(int i = 0; i < tiles.length; i++){
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tiles[i] = new Ptile(i, i < 12 ? 5 : 6);
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}
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corners = new Corner[cornerCount(size)];
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for(int i = 0; i < corners.length; i++){
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corners[i] = new Corner(i);
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}
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edges = new Edge[edgeCount(size)];
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for(int i = 0; i < edges.length; i++){
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edges[i] = new Edge(i);
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}
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}
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public static PlanetGrid create(int size){
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//cache grids between calls, since only ~5 different grids total are needed
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if(size < cache.length && cache[size] != null){
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return cache[size];
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}
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PlanetGrid result;
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if(size == 0){
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result = initialGrid();
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}else{
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result = subdividedGrid(create(size - 1));
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}
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//store grid in cache
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if(size < cache.length){
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cache[size] = result;
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}
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return result;
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}
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static PlanetGrid initialGrid(){
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PlanetGrid grid = new PlanetGrid(0);
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for(Ptile t : grid.tiles){
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t.v = iTiles[t.id];
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for(int k = 0; k < 5; k++){
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t.tiles[k] = grid.tiles[iTilesP[t.id][k]];
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}
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}
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for(int i = 0; i < 5; i++){
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addCorner(i, grid, 0, iTilesP[0][(i + 4) % 5], iTilesP[0][i]);
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}
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for(int i = 0; i < 5; i++){
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addCorner(i + 5, grid, 3, iTilesP[3][(i + 4) % 5], iTilesP[3][i]);
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}
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addCorner(10, grid, 10, 1, 8);
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addCorner(11, grid, 1, 10, 6);
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addCorner(12, grid, 6, 10, 7);
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addCorner(13, grid, 6, 7, 11);
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addCorner(14, grid, 11, 7, 2);
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addCorner(15, grid, 11, 2, 9);
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addCorner(16, grid, 9, 2, 5);
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addCorner(17, grid, 9, 5, 4);
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addCorner(18, grid, 4, 5, 8);
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addCorner(19, grid, 4, 8, 1);
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//add corners to corners
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for(Corner c : grid.corners){
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for(int k = 0; k < 3; k++){
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c.corners[k] = c.tiles[k].corners[(pos(c.tiles[k], c) + 1) % 5];
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}
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}
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//new edges
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int nextEdge = 0;
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for(Ptile t : grid.tiles){
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for(int k = 0; k < 5; k++){
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if(t.edges[k] == null){
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addEdge(nextEdge++, grid, t.id, iTilesP[t.id][k]);
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}
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}
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}
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return grid;
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}
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static PlanetGrid subdividedGrid(PlanetGrid prev){
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PlanetGrid grid = new PlanetGrid(prev.size + 1);
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int prevTiles = prev.tiles.length;
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int prevCorners = prev.corners.length;
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//old tiles
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for(int i = 0; i < prevTiles; i++){
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grid.tiles[i].v = prev.tiles[i].v;
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for(int k = 0; k < grid.tiles[i].edgeCount; k++){
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grid.tiles[i].tiles[k] = grid.tiles[prev.tiles[i].corners[k].id + prevTiles];
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}
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}
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//old corners become tiles
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for(int i = 0; i < prevCorners; i++){
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grid.tiles[i + prevTiles].v = prev.corners[i].v;
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for(int k = 0; k < 3; k++){
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grid.tiles[i + prevTiles].tiles[2 * k] = grid.tiles[prev.corners[i].corners[k].id + prevTiles];
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grid.tiles[i + prevTiles].tiles[2 * k + 1] = grid.tiles[prev.corners[i].tiles[k].id];
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}
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}
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//new corners
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int nextCorner = 0;
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for(Ptile n : prev.tiles){
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Ptile t = grid.tiles[n.id];
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for(int k = 0; k < t.edgeCount; k++){
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addCorner(nextCorner, grid, t.id, t.tiles[(k + t.edgeCount - 1) % t.edgeCount].id, t.tiles[k].id);
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nextCorner++;
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}
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}
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//connect corners
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for(Corner c : grid.corners){
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for(int k = 0; k < 3; k++){
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c.corners[k] = c.tiles[k].corners[(pos(c.tiles[k], c) + 1) % (c.tiles[k].edgeCount)];
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}
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}
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//new edges
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int nextEdge = 0;
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for(Ptile t : grid.tiles){
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for(int k = 0; k < t.edgeCount; k++){
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if(t.edges[k] == null){
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addEdge(nextEdge, grid, t.id, t.tiles[k].id);
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nextEdge++;
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}
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}
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}
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return grid;
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}
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static void addCorner(int id, PlanetGrid grid, int t1, int t2, int t3){
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Corner c = grid.corners[id];
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Ptile[] t = {grid.tiles[t1], grid.tiles[t2], grid.tiles[t3]};
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c.v = Tmp.v31.set(t[0].v).add(t[1].v).add(t[2].v).cpy().nor();
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for(int i = 0; i < 3; i++){
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t[i].corners[pos(t[i], t[(i + 2) % 3])] = c;
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c.tiles[i] = t[i];
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}
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}
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static void addEdge(int id, PlanetGrid grid, int t1, int t2){
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Edge e = grid.edges[id];
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Ptile[] t = {grid.tiles[t1], grid.tiles[t2]};
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Corner[] c = {
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grid.corners[t[0].corners[pos(t[0], t[1])].id],
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grid.corners[t[0].corners[(pos(t[0], t[1]) + 1) % t[0].edgeCount].id]};
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for(int i = 0; i < 2; i++){
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t[i].edges[pos(t[i], t[(i + 1) % 2])] = e;
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e.tiles[i] = t[i];
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c[i].edges[pos(c[i], c[(i + 1) % 2])] = e;
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e.corners[i] = c[i];
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}
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}
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static int pos(Ptile t, Ptile n){
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for(int i = 0; i < t.edgeCount; i++)
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if(t.tiles[i] == n)
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return i;
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return -1;
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}
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static int pos(Ptile t, Corner c){
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for(int i = 0; i < t.edgeCount; i++)
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if(t.corners[i] == c)
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return i;
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return -1;
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}
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static int pos(Corner c, Corner n){
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for(int i = 0; i < 3; i++)
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if(c.corners[i] == n)
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return i;
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return -1;
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}
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static int tileCount(int size){
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return 10 * Mathf.pow(3, size) + 2;
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}
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static int cornerCount(int size){
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return 20 * Mathf.pow(3, size);
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}
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static int edgeCount(int size){
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return 30 * Mathf.pow(3, size);
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}
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public static class Ptile{
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public final int id;
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public final int edgeCount;
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public final Ptile[] tiles;
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public final Corner[] corners;
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public final Edge[] edges;
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public Vec3 v = new Vec3();
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public Ptile(int id, int edgeCount){
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this.id = id;
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this.edgeCount = edgeCount;
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tiles = new Ptile[edgeCount];
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corners = new Corner[edgeCount];
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edges = new Edge[edgeCount];
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}
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}
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public static class Corner{
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public final int id;
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public final Ptile[] tiles = new Ptile[3];
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public final Corner[] corners = new Corner[3];
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public final Edge[] edges = new Edge[3];
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public Vec3 v = new Vec3();
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public Vec3 bv = new Vec3();
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public Corner(int id){
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this.id = id;
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}
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}
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public static class Edge{
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public final int id;
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public final Ptile[] tiles = new Ptile[2];
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public final Corner[] corners = new Corner[2];
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public Edge(int id){
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this.id = id;
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}
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}
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}
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@@ -0,0 +1,102 @@
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package mindustry.graphics.g3d;
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import arc.graphics.*;
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import arc.math.geom.*;
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import arc.util.ArcAnnotate.*;
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import arc.util.*;
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import mindustry.graphics.g3d.PlanetGrid.*;
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public class PlanetMesh extends GenericMesh{
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private Vec3 vec = new Vec3();
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private PlanetGrid grid;
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private Vec3 center = new Vec3();
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private boolean lines;
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private float radius, intensity = 0.2f;
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private final PlanetMesher gen;
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public PlanetMesh(int divisions, PlanetMesher gen){
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this(divisions, gen, 1f, false);
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}
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public PlanetMesh(int divisions, PlanetMesher gen, float radius, boolean lines){
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super(PlanetGrid.create(divisions).tiles.length * 12 * (3 + 3 + 1), lines ? Gl.lines : Gl.triangles);
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this.gen = gen;
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this.radius = radius;
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this.grid = PlanetGrid.create(divisions);
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this.lines = lines;
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generateMesh();
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}
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public @Nullable Vec3 intersect(Ray ray){
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boolean found = Intersector3D.intersectRaySphere(ray, center, radius, Tmp.v33);
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if(!found) return null;
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return Tmp.v33;
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}
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/** @return the sector that is hit by this ray, or null if nothing intersects it. */
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public @Nullable Ptile getTile(Ray ray){
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boolean found = Intersector3D.intersectRaySphere(ray, center, radius, Tmp.v33);
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if(!found) return null;
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return Structs.findMin(grid.tiles, t -> t.v.dst(Tmp.v33));
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}
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private void generateMesh(){
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for(Ptile tile : grid.tiles){
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Vec3 nor = Tmp.v31.setZero();
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Corner[] c = tile.corners;
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for(Corner corner : c){
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corner.bv.set(corner.v).setLength(radius);
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}
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for(Corner corner : c){
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corner.v.setLength(radius + elevation(corner.bv)*intensity);
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}
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for(Corner corner : c){
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nor.add(corner.v);
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}
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nor.nor();
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Vec3 realNormal = normal(c[0].v, c[2].v, c[4].v);
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nor.set(realNormal);
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Color color = color(tile.v);
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if(lines){
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nor.set(1f, 1f, 1f);
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for(int i = 0; i < c.length; i++){
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Vec3 v1 = c[i].v;
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Vec3 v2 = c[(i + 1) % c.length].v;
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vert(v1, nor, color);
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vert(v2, nor, color);
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}
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}else{
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verts(c[0].v, c[1].v, c[2].v, nor, color);
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verts(c[0].v, c[2].v, c[3].v, nor, color);
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verts(c[0].v, c[3].v, c[4].v, nor, color);
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if(c.length > 5){
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verts(c[0].v, c[4].v, c[5].v, nor, color);
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}else{
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verts(c[0].v, c[3].v, c[4].v, nor, color);
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}
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}
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}
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}
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private float elevation(Vec3 v){
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return gen.getHeight(vec.set(v).scl(1f / radius));
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}
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private Color color(Vec3 v){
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return gen.getColor(vec.set(v).scl(1f / radius));
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}
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}
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@@ -0,0 +1,10 @@
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package mindustry.graphics.g3d;
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import arc.graphics.*;
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import arc.math.geom.*;
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/** Defines color and height for a planet mesh. */
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public interface PlanetMesher{
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float getHeight(Vec3 position);
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Color getColor(Vec3 position);
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}
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@@ -0,0 +1,24 @@
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package mindustry.graphics.g3d;
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import arc.graphics.*;
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import arc.math.geom.*;
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public class SphereMesh extends GenericMesh{
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private static final Vec3 v1 = new Vec3(), v2 = new Vec3(), v3 = new Vec3(), v4 = new Vec3();
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protected final float radius;
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public SphereMesh(int divisions, float radius){
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super(20 * (2 << (2 * divisions - 1)) * 7 * 3, Gl.triangles);
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this.radius = radius;
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MeshResult result = Icosphere.create(divisions);
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for(int i = 0; i < result.indices.size; i+= 3){
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v1.set(result.vertices.items, result.indices.items[i] * 3).setLength(radius);
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v2.set(result.vertices.items, result.indices.items[i + 1] * 3).setLength(radius);
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v3.set(result.vertices.items, result.indices.items[i + 2] * 3).setLength(radius);
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verts(v1, v3, v2, normal(v1, v2, v3).scl(-1f), Color.white);
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}
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}
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}
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Reference in New Issue
Block a user