Graphics-Project/vbo.py at main · pklito/Graphics-Project · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
import numpy as np
import moderngl as mgl
import pywavefront


class BaseVBO:
    def __init__(self, ctx):
        self.ctx = ctx
        self.vbo = self.get_vbo()
        self.format: str = None
        self.attribs: list = None

    def get_vertex_data(self): ...

    def get_vbo(self):
        vertex_data = self.get_vertex_data()
        vbo = self.ctx.buffer(vertex_data)
        return vbo

    def destroy(self):
        self.vbo.release()


class CubeVBO(BaseVBO):
    def __init__(self, ctx):
        super().__init__(ctx)
        self.format = '2f 3f 3f'
        self.attribs = ['in_texcoord_0', 'in_normal', 'in_position']

    @staticmethod
    def get_data(vertices, indices):
        data = [vertices[ind] for triangle in indices for ind in triangle]
        return np.array(data, dtype='f4')

    def get_vertex_data(self):
        vertices = [(-1, -1, 1), ( 1, -1,  1), (1,  1,  1), (-1, 1,  1),
                    (-1, 1, -1), (-1, -1, -1), (1, -1, -1), ( 1, 1, -1)]

        indices = [(0, 2, 3), (0, 1, 2),
                   (1, 7, 2), (1, 6, 7),
                   (6, 5, 4), (4, 7, 6),
                   (3, 4, 5), (3, 5, 0),
                   (3, 7, 4), (3, 2, 7),
                   (0, 6, 1), (0, 5, 6)]
        vertex_data = self.get_data(vertices, indices)

        tex_coord_vertices = [(0, 0), (1, 0), (1, 1), (0, 1)]
        tex_coord_indices = [(0, 2, 3), (0, 1, 2),
                             (0, 2, 3), (0, 1, 2),
                             (0, 1, 2), (2, 3, 0),
                             (2, 3, 0), (2, 0, 1),
                             (0, 2, 3), (0, 1, 2),
                             (3, 1, 2), (3, 0, 1),]
        tex_coord_data = self.get_data(tex_coord_vertices, tex_coord_indices)

        normals = [( 0, 0, 1) * 6,
                   ( 1, 0, 0) * 6,
                   ( 0, 0,-1) * 6,
                   (-1, 0, 0) * 6,
                   ( 0, 1, 0) * 6,
                   ( 0,-1, 0) * 6,]
        normals = np.array(normals, dtype='f4').reshape(36, 3)

        vertex_data = np.hstack([normals, vertex_data])
        vertex_data = np.hstack([tex_coord_data, vertex_data])
        return vertex_data


class FileVBO(BaseVBO):
    def __init__(self, app, file):
        self.file = file
        super().__init__(app)
        self.format = '2f 3f 3f'
        self.attribs = ['in_texcoord_0', 'in_normal', 'in_position']

    def get_vertex_data(self):
        objs = pywavefront.Wavefront(self.file, cache=True, parse=True)
        obj = objs.materials.popitem()[1]
        vertex_data = obj.vertices
        vertex_data = np.array(vertex_data, dtype='f4')
        return vertex_data


class SkyBoxVBO(BaseVBO):
    def __init__(self, ctx):
        super().__init__(ctx)
        self.format = '3f'
        self.attribs = ['in_position']

    @staticmethod
    def get_data(vertices, indices):
        data = [vertices[ind] for triangle in indices for ind in triangle]
        return np.array(data, dtype='f4')

    def get_vertex_data(self):
        vertices = [(-1, -1, 1), ( 1, -1,  1), (1,  1,  1), (-1, 1,  1),
                    (-1, 1, -1), (-1, -1, -1), (1, -1, -1), ( 1, 1, -1)]

        indices = [(0, 2, 3), (0, 1, 2),
                   (1, 7, 2), (1, 6, 7),
                   (6, 5, 4), (4, 7, 6),
                   (3, 4, 5), (3, 5, 0),
                   (3, 7, 4), (3, 2, 7),
                   (0, 6, 1), (0, 5, 6)]
        vertex_data = self.get_data(vertices, indices)
        vertex_data = np.flip(vertex_data, 1).copy(order='C')
        return vertex_data


class AdvancedSkyBoxVBO(BaseVBO):
    def __init__(self, ctx):
        super().__init__(ctx)
        self.format = '3f'
        self.attribs = ['in_position']

    def get_vertex_data(self):
        # in clip space
        z = 0.9999
        vertices = [(-1, -1, z), (3, -1, z), (-1, 3, z)]
        vertex_data = np.array(vertices, dtype='f4')
        return vertex_data