commit 610172bf4c37ce9222ef7dd739a848779e193298
parent 175a629e9c96b4d79e6e9693386ccc9a95665e88
Author: bsandro <email@bsandro.tech>
Date: Mon, 20 Oct 2025 22:06:29 +0300
rename files
Diffstat:
4 files changed, 0 insertions(+), 199 deletions(-)
diff --git a/main1.c b/main1.c
@@ -1,199 +0,0 @@
-/* basic vertex+fragment shaders */
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-#include <unistd.h>
-#include <math.h>
-#include <X11/X.h>
-#include <X11/Xlib.h>
-#define GL_GLEXT_PROTOTYPES 1
-#include <GL/gl.h>
-#include <GL/glx.h>
-#include <GL/glu.h>
-
-Display *dpy;
-Window root;
-GLint att[] = { GLX_RGBA, GLX_DEPTH_SIZE, 24, GLX_DOUBLEBUFFER, None };
-XVisualInfo *vi;
-XSetWindowAttributes swa;
-Window win;
-XWindowAttributes gwa;
-XEvent xev;
-
-static const double current_ts() {
- struct timespec ts;
- timespec_get(&ts, TIME_UTC);
- return (double)ts.tv_sec + (double)ts.tv_nsec/1e9;
-}
-
-static double t_started;
-
-//@todo move shaders to separate files
-static const GLchar *vertexSrc = " \n\
-#version 420 \n\
-in vec2 position; \n\
-in vec3 inColor; \n\
-out vec3 color; \n\
-void main() { \n\
- gl_Position = vec4(position, 0.0, 1.0); \n\
- color = inColor; \n\
-} \n\
-";
-
-static const GLchar *fragmentSrc = " \n\
-#version 420 \n\
-uniform double iTime; \n\
-in vec3 color; \n\
-out vec4 outColor; \n\
-void main() { \n\
- float c1 = abs(sin(float(iTime))); \n\
- float c2 = abs(cos(float(iTime))); \n\
- outColor = vec4(color+c1-c2, 1.0); \n\
-} \n\
-";
-
-static GLuint mkShader(GLenum type, const GLchar *src) {
- GLuint shader = glCreateShader(type);
- glShaderSource(shader, 1, &src, NULL);
- glCompileShader(shader);
- GLint ok = 0;
- glGetShaderiv(shader, GL_COMPILE_STATUS, &ok);
- if (!ok) {
- static char buf[512] = {0};
- glGetShaderInfoLog(shader, sizeof(buf)-1, NULL, buf);
- fprintf(stderr, "Shader %d compile error: %s\n", (int)type, buf);
- }
- return shader;
-}
-
-static GLuint linkProgram(GLuint vertex, GLuint fragment) {
- GLuint shaderProgram = glCreateProgram();
- glAttachShader(shaderProgram, vertex);
- glAttachShader(shaderProgram, fragment);
- glBindAttribLocation(shaderProgram, 0, "position");
- glBindFragDataLocation(shaderProgram, 0, "outColor");
- glLinkProgram(shaderProgram);
- return shaderProgram;
-}
-
-void __attribute__((constructor)) start() {
- printf("start()\n");
- t_started = current_ts();
-}
-
-void __attribute((destructor)) end() {
- printf("end()\n");
-}
-
-int main(int argc, char *argv[]) {
- dpy = XOpenDisplay(NULL);
-
- if (dpy == NULL) {
- printf("\n\tcannot connect to X server\n\n");
- exit(0);
- }
-
- root = DefaultRootWindow(dpy);
- vi = glXChooseVisual(dpy, 0, att);
-
- if (vi == NULL) {
- printf("\n\tno appropriate visual found\n\n");
- exit(0);
- } else {
- printf("\n\tvisual %p selected\n", (void *)vi->visualid); /* %p creates hexadecimal output like in glxinfo */
- }
-
- Colormap cmap = XCreateColormap(dpy, root, vi->visual, AllocNone);
- swa.colormap = cmap;
- swa.event_mask = ExposureMask | KeyPressMask;
- win = XCreateWindow(dpy, root, 0, 0, 500, 500, 0, vi->depth, InputOutput, vi->visual, CWColormap | CWEventMask, &swa);
- XMapWindow(dpy, win);
- XStoreName(dpy, win, "OPENGL");
- GLXContext ctx = glXCreateContext(dpy, vi, NULL, GL_TRUE);
- glXMakeCurrent(dpy, win, ctx);
-
- GLuint vao;
- glGenVertexArrays(1, &vao);
- glBindVertexArray(vao);
-
- // [x, y, r, g, b]
- static const GLfloat vertices[] = {
- 0.01f, 0.01f, 1.0f, 0.0f, 0.0f,
- 0.8f, 0.0f, 0.0f, 1.0f, 0.0f,
- 0.0f, 0.8f, 0.0f, 0.0f, 1.0f,
-
- -0.01f, -0.01f, 0.0f, 0.0f, 1.0f,
- -0.8f, 0.0f, 0.0f, 1.0f, 0.0f,
- 0.0f, -0.8f, 1.0f, 0.0f, 0.0f,
-
- 0.3f, 0.3f, 1.0f, 0.0f, 0.0f,
- 0.3f, 0.6f, 1.0f, 0.0f, 0.0f,
- 0.6f, 0.3f, 1.0f, 0.0f, 0.0f,
- 0.6f, 0.6f, 1.0f, 0.0f, 0.0f
- };
-
- static const GLuint elements[] = {
- 0, 1, 5,
- 3, 2, 4,
- 6, 7, 8,
- 7, 8, 9
- };
-
- GLuint vbo;
- glGenBuffers(1, &vbo);
- glBindBuffer(GL_ARRAY_BUFFER, vbo);
- glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
-
- GLuint ebo;
- glGenBuffers(1, &ebo);
- glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo);
- glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(elements), elements, GL_STATIC_DRAW);
-
- GLuint vertex = mkShader(GL_VERTEX_SHADER, vertexSrc);
- GLuint fragment = mkShader(GL_FRAGMENT_SHADER, fragmentSrc);
- GLuint shaderPrg = linkProgram(vertex, fragment);
-
- while (1) {
- while (XPending(dpy)) {
- XEvent xev;
- XNextEvent(dpy, &xev);
- if (xev.type == Expose) {
- XGetWindowAttributes(dpy, win, &gwa);
- glViewport(0, 0, gwa.width, gwa.height);
- } else if (xev.type == KeyPress) {
- printf("btn:%d\n", xev.xbutton.button);
- if (xev.xbutton.button==24||xev.xbutton.button==9) {
- glXMakeCurrent(dpy, None, NULL);
- glXDestroyContext(dpy, ctx);
- XDestroyWindow(dpy, win);
- XCloseDisplay(dpy);
- exit(0);
- }
- } else if (xev.type == ConfigureNotify) {
- XConfigureEvent *ce = (XConfigureEvent *)&xev;
- glViewport(0, 0, ce->width, ce->height);
- }
- }
-
- glClearColor(0.1f, 0.1f, 0.15f, 1.0f);
- glClear(GL_COLOR_BUFFER_BIT);
-
- GLfloat iTime = glGetUniformLocation(shaderPrg, "iTime");
- glUniform1d(iTime, current_ts()-t_started);
- //printf("%f\n", fabsf(sinf(current_ts()-t_started)));
-
- glUseProgram(shaderPrg);
-
- GLint position = glGetAttribLocation(shaderPrg, "position");
- glEnableVertexAttribArray(position);
- glVertexAttribPointer(position, 2, GL_FLOAT, GL_FALSE, 5*sizeof(GLfloat), 0);
- GLint color = glGetAttribLocation(shaderPrg, "inColor");
- glEnableVertexAttribArray(color);
- glVertexAttribPointer(color, 3, GL_FLOAT, GL_FALSE, 5*sizeof(GLfloat), (void *)(2*sizeof(GLfloat)));
- glDrawElements(GL_TRIANGLES, sizeof(elements), GL_UNSIGNED_INT, 0);
-
- glXSwapBuffers(dpy, win);
- usleep(1000*16);
- }
-}
diff --git a/main3.c b/micro.c
diff --git a/main2.c b/shaders.c
diff --git a/main2.c b/tesselating.c
