From: John Tsiombikas <nuclear@member.fsf.org>
Date: Sat, 23 Dec 2023 14:30:55 +0000 (+0200)
Subject: starting part_dna
X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=commitdiff_plain;h=df239da799038254f1cc9e5d7c40ae6f331bc41c;p=mdlife

starting part_dna
---

diff --git a/src/data.s b/src/data.s
index 4bb94b6..328fc12 100644
--- a/src/data.s
+++ b/src/data.s
@@ -4,6 +4,8 @@
 	.globl font8x8_data_end
 	.globl cellspr_data
 	.globl cellspr_data_end
+	.globl cellspr_cmap
+	.globl cellspr_cmap_end
 font8x8_data:
 	.incbin "data/font8x8.img"
 font8x8_data_end:
@@ -13,4 +15,9 @@ cellspr_data:
 	.incbin "data/cellspr.img"
 cellspr_data_end:
 
+	.align 2
+cellspr_cmap:
+	.incbin "data/cellspr.cmap"
+cellspr_cmap_end:
+
 | vi:ft=gas68k:
diff --git a/src/demo.h b/src/demo.h
new file mode 100644
index 0000000..b72b158
--- /dev/null
+++ b/src/demo.h
@@ -0,0 +1,11 @@
+#ifndef DEMO_H_
+#define DEMO_H_
+
+#include <stdint.h>
+
+extern uint32_t frameno;
+
+void dna_init(void);
+void dna_update(void);
+
+#endif	/* DEMO_H_ */
diff --git a/src/main.c b/src/main.c
index faa6b9e..261f1a5 100644
--- a/src/main.c
+++ b/src/main.c
@@ -2,32 +2,21 @@
 #include "z80.h"
 #include "vdp.h"
 #include "sprite.h"
+#include "parts.h"
 #include "debug.h"
 
-#define SPRITE_BASE		0x8000
-extern uint16_t cellspr_data[], cellspr_data_end[];
-
+uint32_t frameno;
 uint32_t dbgval[4];
 
 int main(void)
 {
-	uint16_t *src;
-	int tile, i;
+	int i;
 
 	z80_init();
 	vdp_init();
 	dbg_init();
 
-	for(i=0; i<16; i++) {
-		vdp_setcolor(0, i, i, i, i);
-	}
-
-	/* upload sprite tiles */
-	src = cellspr_data;
-	vdp_setup_addr(VDP_VRAM, SPRITE_BASE);
-	while(src < cellspr_data_end) {
-		VDP_DATA = *src++;
-	}
+	dna_init();
 
 	dbg_setcursor(0, 0);
 	printf("xyzzy");
@@ -38,25 +27,13 @@ int main(void)
 			printf("%08x\n", (unsigned int)dbgval[i]);
 		}
 		spr_begin();
-		tile = VDP_ADDR2TILE(SPRITE_BASE);
-		spr_add(160, 50, VDP_TILENAME(tile, 0, VDP_TILE_FG), SPR_SIZE(1,1));
-		tile++;
-		spr_add(160, 60, VDP_TILENAME(tile, 0, VDP_TILE_FG), SPR_SIZE(1,1));
-		tile++;
-		spr_add(160, 75, VDP_TILENAME(tile, 0, VDP_TILE_FG), SPR_SIZE(1,1));
-		tile++;
-		spr_add(156, 90, VDP_TILENAME(tile, 0, VDP_TILE_FG), SPR_SIZE(1,1));
-		spr_add(164, 90, VDP_TILENAME(tile, 0, VDP_TILE_FG | VDP_TILE_HFLIP), SPR_SIZE(1,1));
-		spr_add(156, 98, VDP_TILENAME(tile, 0, VDP_TILE_FG | VDP_TILE_VFLIP), SPR_SIZE(1,1));
-		spr_add(164, 98, VDP_TILENAME(tile, 0, VDP_TILE_FG | VDP_TILE_HVFLIP), SPR_SIZE(1,1));
-		tile++;
-		spr_add(148, 120, VDP_TILENAME(tile, 0, VDP_TILE_FG), SPR_SIZE(2, 2));
-		spr_add(164, 120, VDP_TILENAME(tile, 0, VDP_TILE_FG | VDP_TILE_HFLIP), SPR_SIZE(2, 2));
-		spr_add(148, 136, VDP_TILENAME(tile, 0, VDP_TILE_FG | VDP_TILE_VFLIP), SPR_SIZE(2, 2));
-		spr_add(164, 136, VDP_TILENAME(tile, 0, VDP_TILE_FG | VDP_TILE_HVFLIP), SPR_SIZE(2, 2));
+
+		dna_update();
 
 		vdp_wait_vblank();
 		spr_submit();
+
+		frameno++;
 	}
 
 	return 0;
diff --git a/src/part_dna.c b/src/part_dna.c
new file mode 100644
index 0000000..da0d5a0
--- /dev/null
+++ b/src/part_dna.c
@@ -0,0 +1,68 @@
+#include "sprite.h"
+#include "vdp.h"
+#include "demo.h"
+#include "parts.h"
+
+static void particle(int x, int y, int sz);
+
+#define SPRITE_BASE		0x8000
+extern uint16_t cellspr_data[], cellspr_data_end[];
+extern unsigned char cellspr_cmap[], cellspr_cmap_end[];
+
+
+void dna_init(void)
+{
+	int i;
+	uint16_t *src;
+	unsigned char *cptr;
+
+	cptr = cellspr_cmap;
+	for(i=0; i<16; i++) {
+		vdp_setcolor(0, i, i, i, i);
+		vdp_setcolor(1, i, cptr[0] >> 4, cptr[1] >> 4, cptr[2] >> 4);
+		cptr += 3;
+	}
+
+	/* upload sprite tiles */
+	src = cellspr_data;
+	vdp_setup_addr(VDP_VRAM, SPRITE_BASE);
+	while(src < cellspr_data_end) {
+		VDP_DATA = *src++;
+	}
+}
+
+void dna_update(void)
+{
+	particle(160, 120, frameno & 0x1f);
+}
+
+static void particle(int x, int y, int sz)
+{
+	int tile;
+
+	sz >>= 3;	/* pixels to levels */
+	if(sz > 4) sz = 4;
+	tile = VDP_ADDR2TILE(SPRITE_BASE) + sz;
+
+	switch(sz) {
+	case 0:
+	case 1:
+	case 2:
+		spr_add(x - 4, y - 4, VDP_TILENAME(tile, 1, VDP_TILE_FG), SPR_SIZE(1, 1));
+		break;
+
+	case 3:
+		spr_add(x - 8, y - 8, VDP_TILENAME(tile, 1, VDP_TILE_FG), SPR_SIZE(1, 1));
+		spr_add(x, y - 8, VDP_TILENAME(tile, 1, VDP_TILE_FG | VDP_TILE_HFLIP), SPR_SIZE(1, 1));
+		spr_add(x - 8, y, VDP_TILENAME(tile, 1, VDP_TILE_FG | VDP_TILE_VFLIP), SPR_SIZE(1, 1));
+		spr_add(x, y, VDP_TILENAME(tile, 1, VDP_TILE_FG | VDP_TILE_HVFLIP), SPR_SIZE(1, 1));
+		break;
+
+	case 4:
+		spr_add(x - 16, y - 16, VDP_TILENAME(tile, 1, VDP_TILE_FG), SPR_SIZE(2, 2));
+		spr_add(x, y - 16, VDP_TILENAME(tile, 1, VDP_TILE_FG | VDP_TILE_HFLIP), SPR_SIZE(2, 2));
+		spr_add(x - 16, y, VDP_TILENAME(tile, 1, VDP_TILE_FG | VDP_TILE_VFLIP), SPR_SIZE(2, 2));
+		spr_add(x, y, VDP_TILENAME(tile, 1, VDP_TILE_FG | VDP_TILE_HVFLIP), SPR_SIZE(2, 2));
+		break;
+	}
+}
diff --git a/src/parts.h b/src/parts.h
new file mode 100644
index 0000000..85977f5
--- /dev/null
+++ b/src/parts.h
@@ -0,0 +1,7 @@
+#ifndef PARTS_H_
+#define PARTS_H_
+
+void dna_init(void);
+void dna_update(void);
+
+#endif	/* PARTS_H_ */