inochi2d.core.dbg source code

1 module inochi2d.core.dbg;
2 import inochi2d;
3 import bindbc.opengl;
4 
5 package(inochi2d) {
6     int indiceCount;
7 
8     Shader dbgShaderLine;
9     Shader dbgShaderPoint;
10     GLuint dbgVAO;
11     GLuint dbgVBO;
12     GLuint dbgIBO;
13 
14     GLuint cVBO;
15 
16     GLint mvpId;
17     GLint colorId;
18     void inInitDebug() {
19         dbgShaderLine = new Shader(import("dbg.vert"), import("dbgline.frag"));
20         dbgShaderPoint = new Shader(import("dbg.vert"), import("dbgpoint.frag"));
21         glGenVertexArrays(1, &dbgVAO);
22         glGenBuffers(1, &dbgVBO);
23         glGenBuffers(1, &dbgIBO);
24 
25         mvpId = dbgShaderLine.getUniformLocation("mvp");
26         colorId = dbgShaderLine.getUniformLocation("color");
27     }
28 }
29 
30 private {
31     void inUpdateDbgVerts(vec3[] points) {
32 
33         // Generate bad line drawing indices
34         ushort[] vts = new ushort[points.length+1];
35         foreach(i; 0..points.length) {
36             vts[i] = cast(ushort)i;
37         }
38         vts[$-1] = 0;
39 
40         inUpdateDbgVerts(points, vts);
41     }
42 
43     void inUpdateDbgVerts(vec3[] points, ushort[] indices) {
44         glBindVertexArray(dbgVAO);
45         glBindBuffer(GL_ARRAY_BUFFER, dbgVBO);
46         glBufferData(GL_ARRAY_BUFFER, points.length*vec3.sizeof, points.ptr, GL_DYNAMIC_DRAW);
47         cVBO = dbgVBO;
48 
49     
50         indiceCount = cast(int)indices.length;
51         glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, dbgIBO);
52         glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.length*ushort.sizeof, indices.ptr, GL_DYNAMIC_DRAW);
53     }
54 }
55 
56 bool inDbgDrawMeshOutlines = false;
57 bool inDbgDrawMeshVertexPoints = false;
58 bool inDbgDrawMeshOrientation = false;
59 
60 /**
61     Size of debug points
62 */
63 void inDbgPointsSize(float size) {
64     glPointSize(size);
65 }
66 
67 /**
68     Size of debug points
69 */
70 void inDbgLineWidth(float size) {
71     glLineWidth(size);
72 }
73 
74 /**
75     Draws points with specified color
76 */
77 void inDbgSetBuffer(vec3[] points) {
78     inUpdateDbgVerts(points);
79 }
80 
81 /**
82     Sets buffer to buffer owned by an other OpenGL object
83 */
84 void inDbgSetBuffer(GLuint vbo, GLuint ibo, int count) {
85     glBindVertexArray(dbgVAO);
86     glBindBuffer(GL_ARRAY_BUFFER, vbo);
87     cVBO = vbo;
88     glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
89     indiceCount = count;
90 }
91 
92 /**
93     Draws points with specified color
94 */
95 void inDbgSetBuffer(vec3[] points, ushort[] indices) {
96     inUpdateDbgVerts(points, indices);
97 }
98 
99 /**
100     Draws current stored vertices as points with specified color
101 */
102 void inDbgDrawPoints(vec4 color, mat4 transform = mat4.identity) {
103     glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE);
104 
105         glBindVertexArray(dbgVAO);
106 
107         dbgShaderPoint.use();
108         dbgShaderPoint.setUniform(mvpId, inGetCamera().matrix * transform);
109         dbgShaderPoint.setUniform(colorId, color);
110 
111         glEnableVertexAttribArray(0);
112         glBindBuffer(GL_ARRAY_BUFFER, cVBO);
113         glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, null);
114         
115         glDrawElements(GL_POINTS, indiceCount, GL_UNSIGNED_SHORT, null);
116         glDisableVertexAttribArray(0);
117 
118     glBlendFuncSeparate(GL_ONE, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE);
119 }
120 
121 /**
122     Draws current stored vertices as lines with specified color
123 */
124 void inDbgDrawLines(vec4 color, mat4 transform = mat4.identity) {
125     glEnable(GL_LINE_SMOOTH);
126     glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE);
127     
128         glBindVertexArray(dbgVAO);
129 
130         dbgShaderLine.use();
131         dbgShaderLine.setUniform(mvpId, inGetCamera().matrix * transform);
132         dbgShaderLine.setUniform(colorId, color);
133 
134         glEnableVertexAttribArray(0);
135         glBindBuffer(GL_ARRAY_BUFFER, cVBO);
136         glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, null);
137         
138         glDrawElements(GL_LINES, indiceCount, GL_UNSIGNED_SHORT, null);
139         glDisableVertexAttribArray(0);
140 
141     glBlendFuncSeparate(GL_ONE, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE);
142     glDisable(GL_LINE_SMOOTH);
143 }