From: John Tsiombikas <nuclear@member.fsf.org>
Date: Mon, 2 Sep 2024 18:25:31 +0000 (+0300)
Subject: foobar
X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=commitdiff_plain;h=HEAD;p=comjam24

foobar
---

diff --git a/Makefile b/Makefile
index 584997a..4a07dd8 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,9 @@
 !ifdef __UNIX__
-obj = src/dos/main.obj src/dos/video.obj src/gamescr.obj src/menuscr.obj &
-	src/voxscape.obj src/lut.obj
+obj = src/dos/main.obj src/dos/video.obj src/game.obj src/gamescr.obj &
+	src/menuscr.obj src/voxscape.obj src/lut.obj
 !else
-obj = src\dos\main.obj src\dos\video.obj src\gamescr.obj src\menuscr.obj &
-	src\voxscape.obj src\lut.obj
+obj = src\dos\main.obj src\dos\video.obj src\game.obj src\gamescr.obj &
+	src\menuscr.obj src\voxscape.obj src\lut.obj
 !endif
 bin = game.com
 
diff --git a/src/dos/main.c b/src/dos/main.c
index bc8d89d..46971ca 100644
--- a/src/dos/main.c
+++ b/src/dos/main.c
@@ -10,7 +10,7 @@ static int quit;
 
 int main(void)
 {
-	if(init_screens() == -1) {
+	if(init_game() == -1) {
 		return 1;
 	}
 
diff --git a/src/game.c b/src/game.c
index d543b61..ce59c4f 100644
--- a/src/game.c
+++ b/src/game.c
@@ -1,13 +1,24 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include "video.h"
 #include "game.h"
 
 int gamescr_init(void);
 int menuscr_init(void);
 
+float fov;
+int znear, zfar;
+
 struct screen *scrlist[NUM_SCREENS];
 struct screen *curscr;
 
-int init_screens(void)
+int init_game(void)
 {
+	fov = 30.0f;
+	znear = 2;
+	zfar = 85;
+
 	if(menuscr_init() == -1) {
 		return -1;
 	}
@@ -28,3 +39,16 @@ int change_screen(struct screen *scr)
 	curscr = scr;
 	return 0;
 }
+
+void panic(const char *fmt, ...)
+{
+	va_list ap;
+
+	close_video();
+
+	va_start(ap, fmt);
+	vfprintf(stderr, fmt, ap);
+	va_end(ap);
+
+	exit(1);
+}
diff --git a/src/game.h b/src/game.h
index e4cbf98..c224c8e 100644
--- a/src/game.h
+++ b/src/game.h
@@ -15,13 +15,16 @@ struct screen {
 	void (*keypress)(int key);
 };
 
+extern float fov;
+extern int znear, zfar;
+
 extern struct screen *scrlist[NUM_SCREENS];
 extern struct screen *curscr;
 
 #define FBWIDTH		320
 #define FBHEIGHT	200
 
-int init_screens(void);
+int init_game(void);
 int change_screen(struct screen *scr);
 
 void panic(const char *fmt, ...);
diff --git a/src/gamescr.c b/src/gamescr.c
index cd4b4b8..6cdc36d 100644
--- a/src/gamescr.c
+++ b/src/gamescr.c
@@ -1,4 +1,8 @@
+#include <malloc.h>
 #include "game.h"
+#include "voxscape.h"
+
+#define VOXSZ	256
 
 static int gamescr_start(void);
 static void gamescr_stop(void);
@@ -11,18 +15,31 @@ static struct screen gamescr = {
 	gamescr_keypress
 };
 
+static unsigned char far *hmap;
+static unsigned char far *colmap;
+
 int gamescr_init(void)
 {
+	scrlist[SCR_GAME] = &gamescr;
 	return 0;
 }
 
 static int gamescr_start(void)
 {
+	if(!(hmap = _fmalloc(VOXSZ * VOXSZ))) {
+		panic("failed to allocate %dx%d heightmap", VOXSZ, VOXSZ);
+	}
+	if(!(colmap = _fmalloc(VOXSZ * VOXSZ))) {
+		panic("failed to allocate %dx%d texture", VOXSZ, VOXSZ);
+	}
+	vox_init(VOXSZ, VOXSZ, hmap, colmap);
+	vox_proj(fov, znear, zfar);
 	return 0;
 }
 
 static void gamescr_stop(void)
 {
+	_ffree(hmap);
 }
 
 static void gamescr_draw(void)
diff --git a/src/voxscape.c b/src/voxscape.c
index 51ef3af..0fbec4e 100644
--- a/src/voxscape.c
+++ b/src/voxscape.c
@@ -17,7 +17,7 @@
 #define NO_LERP
 
 #define XLERP(a, b, t, fp) \
-	((((a) << (fp)) + ((b) - (a)) * (t)) >> fp)
+	((((int32_t)(a) << (fp)) + (int32_t)((b) - (a)) * (t)) >> (fp))
 
 enum {
 	SLICELEN	= 1
@@ -34,7 +34,8 @@ static int vox_horizon;
 static int32_t vox_x, vox_y, vox_angle;
 static int vox_vheight;
 /* projection */
-static int vox_fov, vox_znear, vox_zfar;
+static float vox_fov;
+static int vox_znear, vox_zfar;
 static int vox_nslices;
 static int32_t far *vox_slicelen;
 
@@ -45,11 +46,22 @@ static int vox_num_obj, vox_obj_stride;
 
 int far *projlut;
 
-int vox_init(int xsz, int ysz, uint8_t far *himg, uint8_t far *cimg)
+void vox_init(int x, int y, uint8_t far *himg, uint8_t far *cimg)
 {
 	vox_hmap = himg;
 	vox_color = cimg;
 
+	xsz = x;
+	ysz = y;
+	xmask = x - 1;
+	ymask = y - 1;
+
+	xshift = 0;
+	while(x > 1) {
+		xshift++;
+		x >>= 1;
+	}
+
 	vox_fb = 0;
 	vox_coltop = 0;
 	vox_horizon = 0;
@@ -62,8 +74,6 @@ int vox_init(int xsz, int ysz, uint8_t far *himg, uint8_t far *cimg)
 	projlut = 0;
 
 	vox_vheight = 80;
-
-	return 0;
 }
 
 void vox_destroy(void)
@@ -107,7 +117,7 @@ int vox_view(int32_t x, int32_t y, int h, int32_t angle)
 	return h;
 }
 
-void vox_proj(int fov, int znear, int zfar)
+void vox_proj(float fov, int znear, int zfar)
 {
 	vox_fov = fov;
 	vox_znear = znear;
@@ -149,7 +159,7 @@ void vox_begin(void)
 	_fmemset(vox_coltop, 0, FBWIDTH * sizeof *vox_coltop);
 
 	if(!(vox_valid & SLICELEN)) {
-		float theta = (float)vox_fov * M_PI / 360.0f;	/* half angle */
+		float theta = vox_fov * M_PI / 360.0f;	/* half angle */
 		for(i=0; i<vox_nslices; i++) {
 			vox_slicelen[i] = (int32_t)((vox_znear + i) * tan(theta) * 4.0f * 65536.0f);
 			projlut[i] = (hscale << 8) / (vox_znear + i);
@@ -178,7 +188,7 @@ void vox_render_slice(int n)
 
 	/*proj = (HSCALE << 8) / (vox_znear + n);*/
 
-	for(i=0; i<FBWIDTH/2; i++) {
+	for(i=0; i<FBWIDTH; i++) {
 		col = i << 1;
 		offs = (((y >> 16) & ymask) << xshift) + ((x >> 16) & xmask);
 		if(offs == last_offs) {
@@ -227,13 +237,13 @@ void vox_sky_solid(uint8_t color)
 
 void vox_sky_grad(uint8_t chor, uint8_t ctop)
 {
-	int i, j, colheight, t;
-	int d = FBHEIGHT - vox_horizon;
+	int i, j, colheight;
+	int32_t t, d = FBHEIGHT - vox_horizon;
 	uint8_t grad[FBHEIGHT];
 	uint16_t *fbptr;
 
 	for(i=0; i<d; i++) {
-		t = (i << 16) / d;
+		t = ((int32_t)i << 16) / d;
 		grad[i] = XLERP(ctop, chor, t, 16);
 	}
 	for(i=d; i<FBHEIGHT; i++) {
@@ -251,11 +261,6 @@ void vox_sky_grad(uint8_t chor, uint8_t ctop)
 	}
 }
 
-int vox_height(int x, int y)
-{
-	return H(x, y);
-}
-
 int vox_check_vis(int32_t x0, int32_t y0, int32_t x1, int32_t y1)
 {
 	/* TODO */
diff --git a/src/voxscape.h b/src/voxscape.h
index 6b12533..a59135a 100644
--- a/src/voxscape.h
+++ b/src/voxscape.h
@@ -10,13 +10,13 @@ enum {
 
 extern int far *projlut;
 
-int vox_init(int xsz, int ysz, uint8_t far *himg, uint8_t far *cimg);
+void vox_init(int xsz, int ysz, uint8_t far *himg, uint8_t far *cimg);
 void vox_destroy(void);
 
 void vox_framebuf(int xres, int yres, void *fb, int horizon);
 /* negative height for auto at -h above terrain */
 int vox_view(int32_t x, int32_t y, int h, int32_t angle);
-void vox_proj(int fov, int znear, int zfar);
+void vox_proj(float fov, int znear, int zfar);
 
 void vox_render(void);
 
@@ -26,7 +26,6 @@ void vox_render_slice(int n);
 void vox_sky_solid(uint8_t color);
 void vox_sky_grad(uint8_t chor, uint8_t ctop);
 
-int vox_height(int x, int y);
 int vox_check_vis(int32_t x0, int32_t y0, int32_t x1, int32_t y1);
 
 #endif	/* VOXSCAPE_H_ */