129 lines
3 KiB
C
129 lines
3 KiB
C
#include <GearSrc/SkyBox.h>
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#include <GearSrc/GL.h>
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#include <GearSrc/String.h>
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GSSkyBox GSSkyBoxOpen(GSClient client, const char* base) {
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GSSkyBox skybox = malloc(sizeof(*skybox));
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char* p;
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void* ptr[12];
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int i;
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memset(skybox, 0, sizeof(*skybox));
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skybox->engine = client->engine;
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ptr[0] = &skybox->left;
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ptr[1] = "/left.png";
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ptr[2] = &skybox->right;
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ptr[3] = "/right.png";
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ptr[4] = &skybox->front;
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ptr[5] = "/front.png";
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ptr[6] = &skybox->back;
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ptr[7] = "/back.png";
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ptr[8] = &skybox->up;
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ptr[9] = "/up.png";
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ptr[10] = &skybox->down;
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ptr[11] = "/down.png";
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for(i = 0; i < 12; i += 2) {
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p = GSStringConcat(base, ptr[i + 1]);
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if(!GSGLTextureLoadFile(client->gl, ptr[i], NULL, NULL, p)) {
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free(p);
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GSSkyBoxClose(skybox);
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return NULL;
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}
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free(p);
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}
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return skybox;
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}
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void GSSkyBoxDraw(GSSkyBox skybox) {
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GSGL gl = skybox->engine->client->gl;
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int i;
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GSVector3 v[4];
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GSVector2 t[4];
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GSNumber s = 0.0001;
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t[0][0] = 0, t[0][1] = 0;
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t[1][0] = 0, t[1][1] = 1;
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t[2][0] = 1, t[2][1] = 1;
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t[3][0] = 1, t[3][1] = 0;
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GSGLIgnoreDepth(gl);
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GSGLShadowDisable(gl);
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for(i = 0; i < 6; i++) {
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GLuint tex;
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int j, k;
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if(i == 0) {
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tex = skybox->front;
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v[0][0] = -1 - s, v[0][1] = 1 + s, v[0][2] = -1;
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v[1][0] = -1 - s, v[1][1] = -1 - s, v[1][2] = -1;
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v[2][0] = 1 + s, v[2][1] = -1 - s, v[2][2] = -1;
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v[3][0] = 1 + s, v[3][1] = 1 + s, v[3][2] = -1;
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} else if(i == 1) {
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tex = skybox->back;
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v[0][0] = 1 + s, v[0][1] = 1 + s, v[0][2] = 1;
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v[1][0] = 1 + s, v[1][1] = -1 - s, v[1][2] = 1;
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v[2][0] = -1 - s, v[2][1] = -1 - s, v[2][2] = 1;
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v[3][0] = -1 - s, v[3][1] = 1 + s, v[3][2] = 1;
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} else if(i == 2) {
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tex = skybox->left;
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v[0][0] = -1, v[0][1] = 1 + s, v[0][2] = 1 + s;
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v[1][0] = -1, v[1][1] = -1 - s, v[1][2] = 1 + s;
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v[2][0] = -1, v[2][1] = -1 - s, v[2][2] = -1 - s;
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v[3][0] = -1, v[3][1] = 1 + s, v[3][2] = -1 - s;
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} else if(i == 3) {
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tex = skybox->right;
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v[0][0] = 1, v[0][1] = 1 + s, v[0][2] = -1 - s;
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v[1][0] = 1, v[1][1] = -1 - s, v[1][2] = -1 - s;
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v[2][0] = 1, v[2][1] = -1 - s, v[2][2] = 1 + s;
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v[3][0] = 1, v[3][1] = 1 + s, v[3][2] = 1 + s;
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} else if(i == 4) {
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tex = skybox->up;
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v[0][0] = -1 - s, v[0][1] = 1, v[0][2] = 1 + s;
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v[1][0] = -1 - s, v[1][1] = 1, v[1][2] = -1 - s;
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v[2][0] = 1 + s, v[2][1] = 1, v[2][2] = -1 - s;
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v[3][0] = 1 + s, v[3][1] = 1, v[3][2] = 1 + s;
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} else if(i == 5) {
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tex = skybox->down;
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v[0][0] = -1 - s, v[0][1] = -1, v[0][2] = -1 - s;
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v[1][0] = -1 - s, v[1][1] = -1, v[1][2] = 1 + s;
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v[2][0] = 1 + s, v[2][1] = -1, v[2][2] = 1 + s;
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v[3][0] = 1 + s, v[3][1] = -1, v[3][2] = -1 - s;
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}
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for(j = 0; j < 4; j++) {
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for(k = 0; k < 3; k++) {
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v[j][k] *= GSGLMaxDistance / 2;
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v[j][k] += gl->engine->client->camera[k];
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}
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}
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GSGLTextureSet(gl, tex);
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GSGLPolygon(gl, 4, v, t);
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}
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GSGLTextureSet(gl, 0);
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GSGLShadowEnable(gl);
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GSGLCareDepth(gl);
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}
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void GSSkyBoxClose(GSSkyBox skybox) {
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if(skybox->left > 0) GSGLTextureDelete(skybox->engine->client->gl, skybox->left);
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free(skybox);
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}
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