From: John Tsiombikas <nuclear@member.fsf.org>
Date: Wed, 16 Jun 2021 21:14:44 +0000 (+0300)
Subject: started the level loading routines
X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=cyberay;a=commitdiff_plain;h=721cbdcc5f52c2dda7eb03e645bb92521180a3fa

started the level loading routines
---

diff --git a/src/level.c b/src/level.c
new file mode 100644
index 0000000..4d1e30e
--- /dev/null
+++ b/src/level.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+#include "level.h"
+
+
+int load_level(struct level *lvl, const char *fname)
+{
+}
+
+int ray_level(cgm_ray *ray, struct level *lvl, float maxt, struct hitpoint *hit)
+{
+}
diff --git a/src/mesh.c b/src/mesh.c
new file mode 100644
index 0000000..a84b347
--- /dev/null
+++ b/src/mesh.c
@@ -0,0 +1,103 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "mesh.h"
+
+static char *cleanline(char *s)
+{
+	char *ptr;
+
+	if((ptr = strchr(s, '#'))) *ptr = 0;
+
+	while(*s && isspace(*s)) s++;
+	ptr = s + strlen(s) - 1;
+	while(ptr >= s && isspace(*s)) *ptr-- = 0;
+
+	return *s ? s : 0;
+}
+
+#define APPEND(prefix)	\
+	do { \
+		if(prefix##count >= prefix##max) { \
+			int newsz = prefix##max ? prefix##max * 2 : 8; \
+			void *ptr = realloc(prefix##arr, newsz * sizeof(cgm_vec3)); \
+			if(!ptr) { \
+				fprintf(stderr, "load_mesh: failed to resize array to %d elements\n", newsz); \
+				return -1; \
+			} \
+			prefix##arr = ptr; \
+			prefix##max = newsz; \
+		} \
+	} while(0)
+
+
+int load_mesh(struct mesh *m, const char *fname)
+{
+	int num, nline;
+	FILE *fp;
+	cgm_vec3 v;
+	cgm_vec3 *varr, *narr, *tarr;
+	int vcount, ncount, tcount, vmax, nmax, tmax;
+	char linebuf[256], *line;
+
+	varr = narr = tarr = 0;
+	vcount = ncount = tcount = vmax = nmax = tmax = 0;
+
+	if(!(fp = fopen(fname, "rb"))) {
+		fprintf(stderr, "load_mesh: failed to open: %s\n", fname);
+		return -1;
+	}
+
+	nline = 0;
+	while(fgets(linebuf, sizeof linebuf, fp)) {
+		nline++;
+		if(!(line = cleanline(linebuf))) {
+			continue;
+		}
+
+		switch(line[0]) {
+		case 'v':
+			v.y = v.z = 0;
+			if((num = sscanf(line + 1, "%f %f %f", &v.x, &v.y, &v.z)) < 2) {
+verr:			fprintf(stderr, "load_mesh: ignoring malformed attribute at %d: %s\n", nline, line);
+				continue;
+			}
+			if(isspace(line[1])) {
+				APPEND(v);
+				varr[vcount++] = v;
+			} else if(line[1] == 'n') {
+				APPEND(n);
+				narr[ncount++] = v;
+			} else if(line[1] == 't') {
+				APPEND(t);
+				tarr[ncount].x = v.x;
+				tarr[ncount++].y = v.y;
+			} else {
+				goto verr;
+			}
+			break;
+
+			/* TODO cont */
+		}
+
+	}
+
+	fclose(fp);
+	return 0;
+}
+
+void draw_mesh(struct mesh *m)
+{
+	glEnableClientState(GL_VERTEX_ARRAY);
+	glEnableClientState(GL_NORMAL_ARRAY);
+	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+
+	glVertexPointer(3, GL_FLOAT, sizeof *m->faces, &m->faces->v[0].pos.x);
+	glNormalPointer(GL_FLOAT, sizeof *m->faces, &m->faces->v[0].norm.x);
+	glTexCoordPointer(2, GL_FLOAT, sizeof *m->faces, &m->faces->v[0].tex.x);
+
+	glDrawArrays(GL_TRIANGLES, 0, m->num_faces * 3);
+
+	glDisableClientState(GL_VERTEX_ARRAY);
+	glDisableClientState(GL_NORMAL_ARRAY);
+	glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+}
diff --git a/src/mesh.h b/src/mesh.h
new file mode 100644
index 0000000..b97f9cd
--- /dev/null
+++ b/src/mesh.h
@@ -0,0 +1,20 @@
+#ifndef MESH_H_
+#define MESH_H_
+
+#include <GL/gl.h>
+#include <cgmath/cgmath.h>
+#include "geom.h"
+
+struct mesh {
+	struct triangle *faces;
+	int num_faces;
+
+	struct aabox aabb;
+
+	struct material mtl;
+};
+
+int load_mesh(struct mesh *m, const char *fname);
+void draw_mesh(struct mesh *m);
+
+#endif	/* MESH_H_ */
diff --git a/src/scene.h b/src/scene.h
deleted file mode 100644
index 0b13c51..0000000
--- a/src/scene.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef SCENE_H_
-#define SCENE_H_
-
-struct scene {
-};
-
-#endif	/* SCENE_H_ */