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-rw-r--r--sdl/pyramid.c174
1 files changed, 88 insertions, 86 deletions
diff --git a/sdl/pyramid.c b/sdl/pyramid.c
index 50b1833..4d7ea55 100644
--- a/sdl/pyramid.c
+++ b/sdl/pyramid.c
@@ -15,30 +15,34 @@
* it might be time to split the code, and make a shader version...
*
*/
-
+
#include <SDL/SDL.h>
#include <SDL/SDL_image.h>
-/* for some reason order of the headers matters */
-#include "math3d.h"
-#include "gltools.h"
-#include "glframe.h"
+#include <GL/glew.h>
+#include <GL/freeglut.h>
#include <sys/time.h>
+#include "glframe.h"
+#include "gltools.h"
+#include "math3d.h"
#define FRAMES_PER_SECOND 60
/* function prototypes */
static void resize(int, int);
static void setup_opengl(void);
+static void setup_sdl(void);
+static void setup_glew(void);
+static inline void fps_control(unsigned int);
static void keys(SDL_keysym *, unsigned int *, int);
static void process_events(void);
static void render(void);
/* global */
int program_running = 1;
-GLFrame camera;
+static GLFrame camera;
/* display lists identifiers */
-GLuint ground_list;
-GLuint triangle_list;
+static GLuint ground_list;
+static GLuint triangle_list;
static GLfloat xRot = 0.0f;
static GLfloat yRot = 0.0f;
@@ -174,6 +178,76 @@ static void setup_opengl(void)
glEndList();
}
+static void setup_sdl(void)
+{
+ SDL_Surface *screen;
+
+ if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0 )
+ {
+ fprintf(stderr, "unable to init SDL: %s\n", SDL_GetError());
+ exit(-1);
+ }
+ atexit(SDL_Quit);
+ SDL_WM_SetCaption("Textured Pyramid", NULL);
+ SDL_WM_SetIcon(IMG_Load("tux.png"), NULL);
+
+ SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
+ SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
+ SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
+ SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
+ SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+ SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
+
+ if ((screen = SDL_SetVideoMode(640, 480, 32, SDL_OPENGL | SDL_RESIZABLE)) == NULL)
+ {
+ fprintf(stderr, "unable to set video mode: %s\n", SDL_GetError());
+ exit(-1);
+ }
+
+ SDL_EnableUNICODE(1);
+ /* SDL doesn't trigger off a ResizeEvent at startup, but as we need this
+ * for OpenGL, we do this ourselves */
+ SDL_Event resizeEvent;
+ resizeEvent.type = SDL_VIDEORESIZE;
+ resizeEvent.resize.w = 640;
+ resizeEvent.resize.h = 480;
+ SDL_PushEvent(&resizeEvent);
+}
+
+static void setup_glew(void)
+{
+ /* initalize glew */
+ GLenum glewerr = glewInit();
+ if (GLEW_OK != glewerr)
+ {
+ fprintf(stderr, "error: %s\n", glewGetErrorString(glewerr));
+ exit(-1);
+ }
+ else
+ fprintf(stdout, "status: using GLEW %s\n", glewGetString(GLEW_VERSION));
+
+ /* display OpenGL version */
+ GLint major;
+ GLint minor;
+ glGetIntegerv(GL_MAJOR_VERSION, &major);
+ glGetIntegerv(GL_MINOR_VERSION, &minor);
+ fprintf(stdout, "version: OpenGL %d.%d\n", major, minor);
+}
+
+static inline void fps_control(unsigned int startclock)
+{
+ unsigned int deltaclock = SDL_GetTicks() - startclock;
+ if (deltaclock < 1000 / FRAMES_PER_SECOND)
+ SDL_Delay((1000 / FRAMES_PER_SECOND) - deltaclock);
+
+#ifdef STAT_FPS
+ char buffer[30] = { 0 };
+ sprintf(buffer, "Textured Pyramid: %4d fps",
+ 1000 / (SDL_GetTicks() - startclock));
+ SDL_WM_SetCaption(buffer, NULL);
+#endif
+}
+
static void keys(SDL_keysym *keysym, unsigned int *keys_held, int flag)
{
if (!flag)
@@ -297,92 +371,20 @@ static void render(void)
int main(int argc, char **argv)
{
- SDL_Surface *screen;
+ setup_sdl();
+ setup_glew();
+ setup_opengl();
- if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0 )
- {
- fprintf(stderr, "unable to init SDL: %s\n", SDL_GetError());
- exit(-1);
- }
- atexit(SDL_Quit);
- SDL_WM_SetCaption("Textured Pyramid", NULL);
- SDL_WM_SetIcon(IMG_Load("tux.png"), NULL);
-
- SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
- SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
- SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
- SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
- SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
- SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
-
- if ((screen = SDL_SetVideoMode(640, 480, 32, SDL_OPENGL | SDL_RESIZABLE)) == NULL)
- {
- fprintf(stderr, "unable to set video mode: %s\n", SDL_GetError());
- exit(-1);
- }
-
- SDL_EnableUNICODE(1);
- /* SDL doesn't trigger off a ResizeEvent at startup, but as we need this
- * for OpenGL, we do this ourselves */
- SDL_Event resizeEvent;
- resizeEvent.type = SDL_VIDEORESIZE;
- resizeEvent.resize.w = 640;
- resizeEvent.resize.h = 480;
- SDL_PushEvent(&resizeEvent);
-
- /* initalize glew */
- GLenum glewerr = glewInit();
- if (GLEW_OK != glewerr)
- {
- fprintf(stderr, "error: %s\n", glewGetErrorString(glewerr));
- return -1;
- }
- else
- fprintf(stdout, "status: using GLEW %s\n", glewGetString(GLEW_VERSION));
-
- /* display OpenGL version */
- GLint major;
- GLint minor;
- glGetIntegerv(GL_MAJOR_VERSION, &major);
- glGetIntegerv(GL_MINOR_VERSION, &minor);
- fprintf(stdout, "version: OpenGL %d.%d\n", major, minor);
+ unsigned int startclock;
- setup_opengl();
-
-#ifdef STAT_FPS
- /* fps counter */
- Uint32 startclock = 0;
- Uint32 deltaclock = 0;
- Uint32 current_fps = 0;
-#endif
- struct timeval m_LastCount;
- struct timeval lcurrent;
while (program_running)
{
- gettimeofday(&m_LastCount, 0);
-#ifdef STAT_FPS
startclock = SDL_GetTicks();
-#endif
+
process_events();
render();
-
- gettimeofday(&lcurrent, 0);
- float fSeconds = (float) (lcurrent.tv_sec - m_LastCount.tv_sec);
- float fFraction = (float) (lcurrent.tv_usec - m_LastCount.tv_usec) * 0.000001f;
- float delta = fSeconds + fFraction;
-
- if (delta < 1000 / FRAMES_PER_SECOND)
- SDL_Delay((1000 / FRAMES_PER_SECOND) - delta);
-
-#ifdef STAT_FPS
- deltaclock = SDL_GetTicks() - startclock;
- if (deltaclock != 0 )
- current_fps = 1000 / deltaclock;
- static char buffer[30] = { 0 };
- sprintf(buffer, "Textured Pyramid: %4d fps", current_fps);
- SDL_WM_SetCaption(buffer, NULL);
-#endif
+ fps_control(startclock);
}
glDeleteLists(ground_list, 2);
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-14 22:34:02 +0000