From 944d5158c56f48c74bc32759c911daee3d140d69 Mon Sep 17 00:00:00 2001
From: Vadim Lopatin <coolreader.org@gmail.com>
Date: Mon, 21 Mar 2016 15:48:01 +0300
Subject: [PATCH] d3d example: continue porting dminer - minecraft like engine

---
 examples/d3d/d3d-msvc.visualdproj      |   1 +
 examples/d3d/src/d3d.d                 |   6 ++
 examples/d3d/src/dminer/core/blocks.d  | 109 +++++++++++++++++++++++++
 examples/d3d/src/dminer/core/world.d   |  71 ++++++++++++++++
 examples/example1/views/res/blocks.png | Bin 0 -> 22935 bytes
 examples/example1/views/resources.list |   1 +
 6 files changed, 188 insertions(+)
 create mode 100644 examples/d3d/src/dminer/core/blocks.d
 create mode 100644 examples/example1/views/res/blocks.png

diff --git a/examples/d3d/d3d-msvc.visualdproj b/examples/d3d/d3d-msvc.visualdproj
index a80d15b0..ed3b2e9b 100644
--- a/examples/d3d/d3d-msvc.visualdproj
+++ b/examples/d3d/d3d-msvc.visualdproj
@@ -411,6 +411,7 @@
  <Folder name="d3d">
   <Folder name="dminer">
    <Folder name="core">
+    <File path="src\dminer\core\blocks.d" />
     <File path="src\dminer\core\minetypes.d" />
     <File path="src\dminer\core\world.d" />
    </Folder>
diff --git a/examples/d3d/src/d3d.d b/examples/d3d/src/d3d.d
index cf216325..ca7934ef 100644
--- a/examples/d3d/src/d3d.d
+++ b/examples/d3d/src/d3d.d
@@ -116,6 +116,12 @@ class UiWidget : VerticalLayout {
             _mesh.addCubeMesh(vec3( i * 2 + 1.0f, -i * 2 + 1.0f, i * 2 + 1.0f), 0.2f, vec4(i / 12, 1 - i / 12, i / 12, 1));
             _mesh.addCubeMesh(vec3(-i * 2 - 1.0f, -i * 2 - 1.0f, -i * 2 - 1.0f), 0.2f, vec4(1 - i / 12, i / 12, i / 12, 1));
         }
+
+        import dminer.core.world;
+        World w = new World();
+        for (int x = -100; x < 100; x++)
+            for (int z = -100; z < 100; z++)
+                w.setCell(x, 10, z, 1);
     }
 
     /// returns true is widget is being animated - need to call animate() and redraw
diff --git a/examples/d3d/src/dminer/core/blocks.d b/examples/d3d/src/dminer/core/blocks.d
new file mode 100644
index 00000000..7a438ba3
--- /dev/null
+++ b/examples/d3d/src/dminer/core/blocks.d
@@ -0,0 +1,109 @@
+module dminer.core.blocks;
+
+import dminer.core.minetypes;
+
+/*
+#define BLOCK_TEXTURE_FILENAME "res/png/blocks.png"
+#define BLOCK_TEXTURE_DX 1024
+#define BLOCK_TEXTURE_DY 1024
+#define BLOCK_SPRITE_SIZE 16
+#define BLOCK_SPRITE_STEP 20
+#define BLOCK_SPRITE_OFFSET 21
+#define BLOCK_TEXTURE_SPRITES_PER_LINE 50
+
+*/
+enum BlockVisibility {
+	INVISIBLE,
+	OPAQUE, // completely opaque (cells covered by this block are invisible)
+	OPAQUE_SEPARATE_TX,
+	HALF_OPAQUE, // partially paque, cells covered by this block can be visible, render as normal block
+	HALF_OPAQUE_SEPARATE_TX,
+	HALF_TRANSPARENT, // should be rendered last (semi transparent texture)
+};
+
+class BlockDef {
+public:
+	cell_t id;
+	string name;
+	BlockVisibility visibility = BlockVisibility.INVISIBLE;
+	int txIndex;
+	this() {
+	}
+	this(cell_t blockId, string blockName, BlockVisibility v, int tx) {
+        id = blockId;
+        name = blockName;
+        visibility = v;
+        txIndex = tx;
+	}
+	~this() {
+    }
+	// blocks behind this block can be visible
+	@property bool canPass() { 
+		return visibility == BlockVisibility.INVISIBLE 
+			|| visibility == BlockVisibility.HALF_OPAQUE 
+			|| visibility == BlockVisibility.HALF_OPAQUE_SEPARATE_TX 
+			|| visibility == BlockVisibility.HALF_TRANSPARENT; 
+	}
+	// block is fully opaque (all blocks behind are invisible)
+	@property bool isOpaque() {
+		return visibility == BlockVisibility.OPAQUE
+			|| visibility == BlockVisibility.OPAQUE_SEPARATE_TX;
+	}
+	// block is visible
+	@property bool isVisible() {
+		return visibility != BlockVisibility.INVISIBLE;
+	}
+
+	@property bool terrainSmoothing() {
+		return false;
+	}
+
+	/// create cube face
+	//void createFace(World * world, Position & camPosition, Vector3d pos, Dir face, FloatArray & vertices, IntArray & indexes) {
+    //}
+	/// create faces
+	//void createFaces(World * world, Position & camPosition, Vector3d pos, int visibleFaces, FloatArray & vertices, IntArray & indexes) {
+    //}
+}
+
+
+// block type definitions
+__gshared BlockDef BLOCK_DEFS[256];
+// faster check for block->canPass()
+__gshared bool BLOCK_TYPE_CAN_PASS[256];
+// faster check for block->isOpaque()
+__gshared bool BLOCK_TYPE_OPAQUE[256];
+// faster check for block->isVisible()
+__gshared bool BLOCK_TYPE_VISIBLE[256];
+// faster check for block->isVisible()
+__gshared bool BLOCK_TERRAIN_SMOOTHING[256];
+
+/// registers new block type
+void registerBlockType(BlockDef def) {
+    if (BLOCK_DEFS[def.id]) {
+        if (BLOCK_DEFS[def.id] is def)
+            return;
+        destroy(BLOCK_DEFS[def.id]);
+    }
+    BLOCK_DEFS[def.id] = def;
+    // init property shortcuts
+    BLOCK_TYPE_CAN_PASS[def.id] = def.canPass;
+    BLOCK_TYPE_OPAQUE[def.id] = def.isOpaque;
+    BLOCK_TYPE_VISIBLE[def.id] = def.isVisible;
+    BLOCK_TERRAIN_SMOOTHING[def.id] = def.terrainSmoothing;
+}
+
+/// init block types array
+__gshared static this() {
+    import std.string;
+    for (int i = 0; i < 256; i++) {
+        if (!BLOCK_DEFS[i]) {
+            registerBlockType(new BlockDef(cast(cell_t)i, "undef%d".format(i), BlockVisibility.INVISIBLE, 0));
+        }
+    }
+    BLOCK_TYPE_CAN_PASS[BOUND_SKY] = false;
+    BLOCK_TYPE_VISIBLE[BOUND_SKY] = false;
+    BLOCK_TYPE_CAN_PASS[BOUND_BOTTOM] = false;
+    BLOCK_TYPE_VISIBLE[BOUND_BOTTOM] = true;
+}
+
diff --git a/examples/d3d/src/dminer/core/world.d b/examples/d3d/src/dminer/core/world.d
index e62781cc..f6ad3cb9 100644
--- a/examples/d3d/src/dminer/core/world.d
+++ b/examples/d3d/src/dminer/core/world.d
@@ -1,6 +1,7 @@
 module dminer.core.world;
 
 import dminer.core.minetypes;
+import dminer.core.blocks;
 
 const int MAX_VIEW_DISTANCE_BITS = 7;
 const int MAX_VIEW_DISTANCE = (1 << MAX_VIEW_DISTANCE_BITS);
@@ -104,3 +105,73 @@ public:
 			maxx = x + 1;
 	}
 }
+
+/// Voxel World
+class World {
+private:
+	//Position camPosition;
+	int maxVisibleRange = MAX_VIEW_DISTANCE;
+	int lastChunkX = 1000000;
+	int lastChunkZ = 1000000;
+	Chunk * lastChunk;
+	ChunkMatrix chunks;
+	//DiamondVisitor visitorHelper;
+public:
+	this()
+    {
+    }
+	~this() {
+
+	}
+	//void visitVisibleCellsAllDirectionsFast(Position & position, CellVisitor * visitor);
+	//Position & getCamPosition() { return camPosition; }
+	cell_t getCell(Vector3d v) {
+		return getCell(v.x, v.y, v.z);
+	}
+	cell_t getCell(int x, int y, int z) {
+        if (y < 0)
+            return 3;
+        int chunkx = x >> CHUNK_DX_SHIFT;
+        int chunkz = z >> CHUNK_DX_SHIFT;
+        Chunk * p;
+        if (lastChunkX == chunkx && lastChunkZ == chunkz) {
+            p = lastChunk;
+        } else {
+            p = chunks.get(chunkx, chunkz);
+            lastChunkX = chunkx;
+            lastChunkZ = chunkz;
+            lastChunk = p;
+        }
+        if (!p)
+            return NO_CELL;
+        return p.get(x & CHUNK_DX_MASK, y, z & CHUNK_DX_MASK);
+    }
+	bool isOpaque(Vector3d v) {
+        cell_t cell = getCell(v);
+        return BLOCK_TYPE_OPAQUE[cell] && cell != BOUND_SKY;
+    }
+	void setCell(int x, int y, int z, cell_t value) {
+        int chunkx = x >> CHUNK_DX_SHIFT;
+        int chunkz = z >> CHUNK_DX_SHIFT;
+        Chunk * p;
+        if (lastChunkX == chunkx && lastChunkZ == chunkz) {
+            p = lastChunk;
+        }
+        else {
+            p = chunks.get(chunkx, chunkz);
+            lastChunkX = chunkx;
+            lastChunkZ = chunkz;
+            lastChunk = p;
+        }
+        if (!p) {
+            p = new Chunk();
+            chunks.set(chunkx, chunkz, p);
+            lastChunkX = chunkx;
+            lastChunkZ = chunkz;
+            lastChunk = p;
+        }
+        p.set(x & CHUNK_DX_MASK, y, z & CHUNK_DX_MASK, value);
+    }
+	//bool canPass(Vector3d pos, Vector3d size) {
+    //}
+}
diff --git a/examples/example1/views/res/blocks.png b/examples/example1/views/res/blocks.png
new file mode 100644
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diff --git a/examples/example1/views/resources.list b/examples/example1/views/resources.list
index c767a4fe..d05c5428 100644
--- a/examples/example1/views/resources.list
+++ b/examples/example1/views/resources.list
@@ -16,3 +16,4 @@ res/mdpi/edit-undo.png
 res/mdpi/edit-unindent.png
 res/mdpi/tx_fabric.jpg
 res/theme_custom1.xml
+res/blocks.png