blob: 5288075411bfb96dd2f0430d5dc44e71a8673c69 (
plain)
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
|
;;; Chickadee Game Toolkit
;;; Copyright © 2019, 2021 David Thompson <davet@gnu.org>
;;;
;;; Chickadee is free software: you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published
;;; by the Free Software Foundation, either version 3 of the License,
;;; or (at your option) any later version.
;;;
;;; Chickadee is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with this program. If not, see
;;; <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; Simple forward rendered Phong lighting model.
;;
;;; Code:
(define-module (chickadee graphics phong)
#:use-module (chickadee config)
#:use-module (chickadee math vector)
#:use-module (chickadee graphics color)
#:use-module (chickadee graphics engine)
#:use-module (chickadee graphics light)
#:use-module (chickadee graphics shader)
#:use-module (chickadee graphics texture)
#:use-module (srfi srfi-9)
#:export (make-phong-material
phong-material?
phong-material-name
phong-material-ambient
phong-material-ambient-map
phong-material-use-ambient-map?
phong-material-diffuse
phong-material-diffuse-map
phong-material-use-diffuse-map?
phong-material-specular
phong-material-specular-map?
phong-material-use-specular-map?
phong-material-specular-exponent
phong-material-bump-map
phong-material-use-bump-map?
default-phong-material
load-phong-shader
shader-apply/phong))
;;;
;;; Phong Material
;;;
(define-shader-type <phong-material>
make-phong-material
phong-material?
(local-field name phong-material-name)
(float-vec3 ambient phong-material-ambient)
(local-field ambient-map phong-material-ambient-map)
(bool use-ambient-map phong-material-use-ambient-map?)
(float-vec3 diffuse phong-material-diffuse)
(local-field diffuse-map phong-material-diffuse-map)
(bool use-diffuse-map phong-material-use-diffuse-map?)
(float-vec3 specular phong-material-specular)
(local-field specular-map phong-material-specular-map)
(bool use-specular-map phong-material-use-specular-map?)
(float shininess phong-material-shininess)
(local-field bump-map phong-material-bump-map)
(bool use-bump-map phong-material-use-bump-map?))
(define default-phong-material
(make-phong-material #:name "default"
#:ambient (vec3 0.5 0.5 0.5)
#:ambient-map null-texture
#:use-ambient-map #f
#:diffuse (vec3 0.8 0.8 0.8)
#:diffuse-map null-texture
#:use-diffuse-map #f
#:specular (vec3 0.3 0.3 0.3)
#:specular-map null-texture
#:use-specular-map #f
#:shininess 32.0
#:bump-map null-texture
#:use-bump-map #f))
;;;
;;; Phong Shader
;;;
(define-graphics-variable phong-shader
(load-shader (scope-datadir "shaders/phong-vert.glsl")
(scope-datadir "shaders/phong-frag.glsl")))
(define (shader-apply/phong vertex-array material model-matrix view-matrix
camera-position lights ambient-light-color)
(let ((shader (graphics-variable-ref phong-shader)))
(with-graphics-state ((g:texture-0 (phong-material-ambient-map material))
(g:texture-1 (phong-material-diffuse-map material))
(g:texture-2 (phong-material-specular-map material))
(g:texture-3 (phong-material-bump-map material)))
(shader-apply shader vertex-array
#:model model-matrix
#:view view-matrix
#:projection (current-projection)
#:material material
#:camera-position camera-position
#:ambient-light-color ambient-light-color
#:lights lights))))
|
