diff options
Diffstat (limited to 'progs/objviewer/skybox.c')
| -rw-r--r-- | progs/objviewer/skybox.c | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/progs/objviewer/skybox.c b/progs/objviewer/skybox.c deleted file mode 100644 index 93331b9c16..0000000000 --- a/progs/objviewer/skybox.c +++ /dev/null @@ -1,187 +0,0 @@ - - -#include <assert.h> -#include <stdio.h> -#include <stddef.h> -#include <stdlib.h> -#include <string.h> -#include <GL/glew.h> -#include <GL/glu.h> -#include "readtex.h" -#include "skybox.h" - - -static int -load(GLenum target, const char *filename, - GLboolean flipTB, GLboolean flipLR) -{ - GLint w, h; - GLenum format; - GLubyte *img = LoadRGBImage( filename, &w, &h, &format ); - if (!img) { - printf("Error: couldn't load texture image %s\n", filename); - return 0; - } - assert(format == GL_RGB); - - printf("Load cube face 0x%x: %s %d x %d\n", target, filename, w, h); - - /* <sigh> the way the texture cube mapping works, we have to flip - * images to make things look right. - */ - if (flipTB) { - const int stride = 3 * w; - GLubyte temp[3*1024]; - int i; - for (i = 0; i < h / 2; i++) { - memcpy(temp, img + i * stride, stride); - memcpy(img + i * stride, img + (h - i - 1) * stride, stride); - memcpy(img + (h - i - 1) * stride, temp, stride); - } - } - if (flipLR) { - const int stride = 3 * w; - GLubyte temp[3]; - GLubyte *row; - int i, j; - for (i = 0; i < h; i++) { - row = img + i * stride; - for (j = 0; j < w / 2; j++) { - int k = w - j - 1; - temp[0] = row[j*3+0]; - temp[1] = row[j*3+1]; - temp[2] = row[j*3+2]; - row[j*3+0] = row[k*3+0]; - row[j*3+1] = row[k*3+1]; - row[j*3+2] = row[k*3+2]; - row[k*3+0] = temp[0]; - row[k*3+1] = temp[1]; - row[k*3+2] = temp[2]; - } - } - } - - gluBuild2DMipmaps(target, GL_RGB, w, h, format, GL_UNSIGNED_BYTE, img); - free(img); - return 1; -} - - -GLuint -LoadSkyBoxCubeTexture(const char *filePosX, - const char *fileNegX, - const char *filePosY, - const char *fileNegY, - const char *filePosZ, - const char *fileNegZ) -{ - GLuint tex; - - glGenTextures(1, &tex); - glBindTexture(GL_TEXTURE_CUBE_MAP, tex); - - glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, - GL_LINEAR_MIPMAP_NEAREST); - - if (!load(GL_TEXTURE_CUBE_MAP_POSITIVE_X, filePosX, GL_TRUE, GL_TRUE)) - return 0; - if (!load(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, fileNegX, GL_TRUE, GL_TRUE)) - return 0; - if (!load(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, filePosY, GL_TRUE, GL_TRUE)) - return 0; - if (!load(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, fileNegY, GL_TRUE, GL_TRUE)) - return 0; - if (!load(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, filePosZ, GL_TRUE, GL_TRUE)) - return 0; - if (!load(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, fileNegZ, GL_TRUE, GL_TRUE)) - return 0; - - return tex; -} - - -#define eps1 0.99 -#define br 20.0 /* box radius */ - -void -DrawSkyBoxCubeTexture(GLuint tex) -{ - struct vertex { - float x, y, z, s, t, r; - }; - - static const struct vertex verts[24] = { - /* +X side */ - { br, -br, -br, 1.0, -eps1, -eps1 }, - { br, -br, br, 1.0, -eps1, eps1 }, - { br, br, br, 1.0, eps1, eps1 }, - { br, br, -br, 1.0, eps1, -eps1 }, - - /* -X side */ - { -br, br, -br, -1.0, eps1, -eps1 }, - { -br, br, br, -1.0, eps1, eps1 }, - { -br, -br, br, -1.0, -eps1, eps1 }, - { -br, -br, -br, -1.0, -eps1, -eps1 }, - - /* +Y side */ - { br, br, -br, eps1, 1.0, -eps1 }, - { br, br, br, eps1, 1.0, eps1 }, - { -br, br, br, -eps1, 1.0, eps1 }, - { -br, br, -br, -eps1, 1.0, -eps1 }, - - /* -Y side */ - { -br, -br, -br, -eps1, -1.0, -eps1 }, - { -br, -br, br, -eps1, -1.0, eps1 }, - { br, -br, br, eps1, -1.0, eps1 }, - { br, -br, -br, eps1, -1.0, -eps1 }, - - /* +Z side */ - { br, -br, br, eps1, -eps1, 1.0 }, - { -br, -br, br, -eps1, -eps1, 1.0 }, - { -br, br, br, -eps1, eps1, 1.0 }, - { br, br, br, eps1, eps1, 1.0 }, - - /* -Z side */ - { br, br, -br, eps1, eps1, -1.0 }, - { -br, br, -br, -eps1, eps1, -1.0 }, - { -br, -br, -br, -eps1, -eps1, -1.0 }, - { br, -br, -br, eps1, -eps1, -1.0 }, - }; - - static GLuint vbo = 0; - - if (!vbo ) { - glGenBuffersARB(1, &vbo); - glBindBufferARB(GL_ARRAY_BUFFER_ARB, vbo); - glBufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts), verts, - GL_STATIC_DRAW_ARB); - } - else { - glBindBufferARB(GL_ARRAY_BUFFER_ARB, vbo); - } - - glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); - - glVertexPointer(3, GL_FLOAT, sizeof(struct vertex), - (void *) offsetof(struct vertex, x)); - glTexCoordPointer(3, GL_FLOAT, sizeof(struct vertex), - (void *) offsetof(struct vertex, s)); - glEnableClientState(GL_VERTEX_ARRAY); - glEnableClientState(GL_TEXTURE_COORD_ARRAY); - - glBindTexture(GL_TEXTURE_CUBE_MAP, tex); - glEnable(GL_TEXTURE_CUBE_MAP); - - glDisable(GL_BLEND); - - glDrawArrays(GL_QUADS, 0, 24); - - glDisable(GL_TEXTURE_CUBE_MAP); - - glDisableClientState(GL_VERTEX_ARRAY); - glDisableClientState(GL_TEXTURE_COORD_ARRAY); - - glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0); -} - |