anchovy.graphics.mesh source code

1 /*
2 Copyright (c) 2013 Andrey Penechko
3 
4 Boost Software License - Version 1.0 - August 17th, 2003
5 
6 Permission is hereby granted, free of charge, to any person or organization
7 obtaining a copy of the software and accompanying documentation covered by
8 this license the "Software" to use, reproduce, display, distribute,
9 execute, and transmit the Software, and to prepare derivative works of the
10 Software, and to permit third-parties to whom the Software is furnished to
11 do so, all subject to the following:
12 
13 The copyright notices in the Software and this entire statement, including
14 the above license grant, this restriction and the following disclaimer,
15 must be included in all copies of the Software, in whole or in part, and
16 all derivative works of the Software, unless such copies or derivative
17 works are solely in the form of machine-executable object code generated by
18 a source language processor.
19 
20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
23 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
24 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
25 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 DEALINGS IN THE SOFTWARE.
27 */
28 
29 module anchovy.graphics.mesh;
30 
31 public import dlib.math.vector;
32 public import dlib.math.quaternion;
33 import derelict.opengl3.gl3;
34 
35 /******
36  * Vertex attribute storage class. For use in meshes
37  *
38  * Attribute will be used like this, when there is more then 1 attribute presented
39  * -----
40  * glVertexAttribPointer(location, elementNum, elementType, normalized, elementNum*elementSize, cast(void*)offset);
41  * ---
42  * or like this, when there is only one attribute in the mesh
43  * -----
44  * glVertexAttribPointer(location, elementNum, elementType, normalized, 0, null);
45  * ---
46  *****/
47 
48 class Attribute
49 {
50 	uint location;
51 	uint elementNum;///number of 
52 	uint elementType;///GL_FLOAT etc
53 	uint elementSize;///in bytes
54 	uint offset;///offset from the begining of buffer
55 	bool normalized;
56 }
57 
58 class Mesh
59 {	
60 	
61 	Vector3f		position;
62 	Quaternionf		orientation;
63 	ubyte[] 	meshData;
64 	GLuint		vao;
65 	GLuint		vbo;
66 
67 
68 	this(){
69 		glGenBuffers( 1, &vbo );
70 		glGenVertexArrays(1, &vao);
71 	}
72 	~this()
73 	{
74 		glDeleteBuffers(1, &vbo);
75 		glDeleteVertexArrays(1, &vao);
76 	}
77 	
78 	void load(){
79 		glBindVertexArray(vao);
80 		glBindBuffer(GL_ARRAY_BUFFER, vbo );
81 		glBufferData(GL_ARRAY_BUFFER, meshData.length, meshData.ptr, GL_STATIC_DRAW);
82 		glEnableVertexAttribArray(0);
83 		glEnableVertexAttribArray(1);
84 		glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6*float.sizeof, null);
85 		glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6*float.sizeof, cast(void*)(3*float.sizeof));
86 		glBindBuffer(GL_ARRAY_BUFFER,0);
87 		glBindVertexArray(0);
88 	}
89 	
90 	void bind(){
91 		glBindVertexArray(vao);
92 	}
93 		
94 	void render(){
95 		glDrawArrays(GL_TRIANGLES, 0, meshData.length/24);//meshData.length/12);
96 	}
97 	
98 }
99