voxelman.model.vertex source code

1 /**
2 Copyright: Copyright (c) 2016 Andrey Penechko.
3 License: $(WEB boost.org/LICENSE_1_0.txt, Boost License 1.0).
4 Authors: Andrey Penechko.
5 */
6 
7 module voxelman.model.vertex;
8 
9 import std.meta;
10 import derelict.opengl3.gl3;
11 import voxelman.math;
12 
13 align(4) struct VertexPosColor(PosType, ColType)
14 {
15 	this(Pos, Col)(Pos x, Pos y, Pos z, Col color)
16 	{
17 		this.position = Vector!(PosType, 3)(x, y, z);
18 		this.color = Vector!(ColType, 3)(color);
19 	}
20 
21 	this(Vector!(PosType, 3) p, Vector!(ColType, 3) color)
22 	{
23 		this.position = p;
24 		this.color = color;
25 	}
26 
27 	align(4):
28 	Vector!(PosType, 3) position;
29 	Vector!(ColType, 3) color;
30 
31 	void toString()(scope void delegate(const(char)[]) sink) const
32 	{
33 		import std.format : formattedWrite;
34 		sink.formattedWrite("V!(%s,%s)(%s, %s)", stringof(PosType), stringof(ColType), position, color);
35 	}
36 
37 	static void setAttributes() {
38 		enum Size = typeof(this).sizeof;
39 
40 		// position
41 		glEnableVertexAttribArray(0);
42 		enum uint posGlType = glTypeOf!PosType;
43 		enum posOffset = position.offsetof;
44 		enum bool doPosNomalization = GL_FALSE;
45 		glVertexAttribPointer(0, 3, posGlType, doPosNomalization, Size, null);
46 
47 		// color
48 		glEnableVertexAttribArray(1);
49 		enum uint colGlType = glTypeOf!ColType;
50 		enum colOffset = color.offsetof;
51 		enum bool doColNomalization = normalizeColorType!ColType;
52 		glVertexAttribPointer(1, 3, colGlType, doColNomalization, Size, cast(void*)colOffset);
53 	}
54 }
55 
56 template glTypeOf(T) {
57 	enum glTypeOf = glTypes[glTypeIndex!T];
58 }
59 
60 template normalizeColorType(T) {
61 	enum normalizeColorType = normalizeColorTable[glTypeIndex!T];
62 }
63 
64 alias glTypeIndex(T) = staticIndexOf!(T,
65 	byte,  // GL_BYTE
66 	ubyte, // GL_UNSIGNED_BYTE
67 	short, // GL_SHORT
68 	ushort,// GL_UNSIGNED_SHORT
69 	int,   // GL_INT
70 	uint,  // GL_UNSIGNED_INT
71 	half,  // GL_HALF_FLOAT
72 	float, // GL_FLOAT
73 	double,// GL_DOUBLE
74 	);
75 
76 static immutable uint[] glTypes = [
77 	GL_BYTE,
78 	GL_UNSIGNED_BYTE,
79 	GL_SHORT,
80 	GL_UNSIGNED_SHORT,
81 	GL_INT,
82 	GL_UNSIGNED_INT,
83 	GL_HALF_FLOAT,
84 	GL_FLOAT,
85 	GL_DOUBLE,
86 ];
87 
88 static immutable bool[] normalizeColorTable = [
89 	true,  // GL_BYTE
90 	true,  // GL_UNSIGNED_BYTE
91 	true,  // GL_SHORT
92 	true,  // GL_UNSIGNED_SHORT
93 	true,  // GL_INT
94 	true,  // GL_UNSIGNED_INT
95 	false, // GL_HALF_FLOAT
96 	false, // GL_FLOAT
97 	false, // GL_DOUBLE
98 ];