From: John Tsiombikas <nuclear@member.fsf.org>
Date: Fri, 28 May 2021 07:48:40 +0000 (+0300)
Subject: test sprite scaling
X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=gbajam21;a=commitdiff_plain;h=e0ad011e797f4c9b789fb0be457e52fbe322202c

test sprite scaling
---

diff --git a/src/gamescr.c b/src/gamescr.c
index 023114b..5a84ee6 100644
--- a/src/gamescr.c
+++ b/src/gamescr.c
@@ -27,6 +27,8 @@ static unsigned char rot;
 static int32_t tunrot;
 static int32_t tunmat[4], tunx, tuny;
 
+static int rune_dist = 16;
+
 void gamescr(void)
 {
 	int i;
@@ -199,8 +201,14 @@ static void vblank(void)
 
 		if(bnstate & BN_LEFT) x -= gate_speed;
 		if(bnstate & BN_RIGHT) x += gate_speed;
-		if(bnstate & BN_UP) y -= gate_speed;
-		if(bnstate & BN_DOWN) y += gate_speed;
+		if(bnstate & BN_UP) {
+			rune_dist += 2;
+			if(rune_dist > 0xff) rune_dist = 0xff;
+		}
+		if(bnstate & BN_DOWN) {
+			rune_dist -= 2;
+			if(rune_dist < 8) rune_dist = 8;
+		}
 
 		if(x < 0) x = 0;
 		if(x > 239) x = 239;
@@ -217,10 +225,10 @@ static void vblank(void)
 	spr_oam(oam, 0, 512, x - 64, y - 64, SPR_SZ64 | SPR_DBLSZ |
 			SPR_ROTSCL | SPR_ROTSCL_SEL(0));
 
-	mat[0] = COS(rot);
-	mat[1] = -SIN(rot);
-	mat[2] = SIN(rot);
-	mat[3] = COS(rot);
+	mat[0] = COS(rot) * rune_dist >> 4;
+	mat[1] = -SIN(rot) * rune_dist >> 4;
+	mat[2] = SIN(rot) * rune_dist >> 4;
+	mat[3] = COS(rot) * rune_dist >> 4;
 	spr_transform(oam, 0, mat);