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
122
123
124
125
126
127
128
129
130
131
|
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <signal.h>
#include <GL/glew.h>
#include <GLFW/glfw3.h>
#include "main.h"
#include "linear.h"
#include "shader.h"
float vertices[] = {
-0.5f, -0.5f, 0.0f, 1.0f, 1.0f, 0.0f,
0.5f, -0.5f, 0.0f, 1.0f, 1.0f, 0.0f,
-0.5f, 0.5f, 0.0f, 1.0, 1.0f, 0.0f,
0.5f, 0.5f, 0.0f, 1.0, 1.0f, 0.0f,
};
unsigned int indices[] = {
0, 1, 2,
2, 3, 1
};
static void userError(const char *msg, const char *detail);
static void glfw_size_callback(GLFWwindow *window, int width, int height);
static void processInput(GLFWwindow *window);
void
userError(const char *msg, const char *detail)
{
fprintf(stderr, "%s: %s\n", msg, detail);
exit(1);
}
static void
glfw_size_callback(GLFWwindow *window, int width, int height)
{
glViewport(0, 0, width, height);
}
void
processInput(GLFWwindow *window)
{
if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS
|| glfwGetKey(window, GLFW_KEY_Q) == GLFW_PRESS)
glfwSetWindowShouldClose(window, 1);
if (glfwGetKey(window, GLFW_KEY_1) == GLFW_PRESS)
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
if (glfwGetKey(window, GLFW_KEY_2) == GLFW_PRESS)
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
if (glfwGetKey(window, GLFW_KEY_3) == GLFW_PRESS)
glPolygonMode(GL_FRONT_AND_BACK, GL_POINT);
}
int main()
{
GLFWwindow *window;
const char *glfwErrno;
if (!glfwInit()) {
glfwGetError(&glfwErrno);
glfwTerminate();
userError("glfwInit() Error", glfwErrno);
}
window = glfwCreateWindow(640, 480, "Mverse", NULL, NULL);
if (!window) {
glfwTerminate();
userError("glfwCreateWindow() failed", "Can't create window");
}
glfwSetFramebufferSizeCallback(window, glfw_size_callback);
glfwMakeContextCurrent(window);
GLubyte glewErrno = glewInit();
if (glewErrno != GLEW_OK) {
glfwTerminate();
userError("glewInit() failed", (const char *)glewGetErrorString(glewErrno));
}
unsigned int VBO, VAO, EBO;
glGenVertexArrays(1, &VAO);
glGenBuffers(1, &VBO);
glGenBuffers(1, &EBO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
glBindVertexArray(VAO);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void *)0);
glEnableVertexAttribArray(0);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void *)(3 * sizeof(float)));
glEnableVertexAttribArray(1);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);
unsigned int shaderProgram = shaderCreateProgram("shaders/vertex.vsh",
"shaders/fragment.vsh");
unsigned int transformLoc;
mat4 transform;
while (!glfwWindowShouldClose(window)) {
processInput(window);
glClearColor(0.2f, 0.2f, 0.2f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
glUseProgram(shaderProgram);
glBindVertexArray(VAO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
transformLoc = glGetUniformLocation(shaderProgram, "trans");
transform = linearRotate(45.0, linearVec3(0, 0, 1));
glUniformMatrix4fv(transformLoc, 1, GL_FALSE, transform.matrix[0]);
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
glfwSwapBuffers(window);
glfwPollEvents();
}
glfwTerminate();
return 0;
}
|
