update

include/gbi_extension.h

@@ -69,6 +69,16 @@
 /***
  ***  4 Triangles
  ***/
+/**
+ * Remarks:
+ * Ryan: I've been learning a lot about PD's graphics microcode lately. It's likely that the decision to
+ * implement tri4 was to reduce memory usage in RDRAM. But to fit 4 tris in one command they had to limit
+ * themselves to 4 bits per vertex, which means they can only address up to 16 vertices. They could have
+ * fit 32 vertices in DMEM if they wanted. In stock microcodes the vertex IDs are pre-multiplied by 10
+ * which makes it easy for the RSP to calculate the vertex offset in the DMEM buffer (it can use a
+ * single shift operation). But because PD is using a compact format there's more work for the RSP to
+ * calculate it. So they've sacrificed RSP performance for memory saving.
+*/
 
 //cannot use 2tri with 4tri, so lets just make sure they are undefined so errors happen.
 #undef gSP2Triangles
@@ -186,6 +196,14 @@
     _g->words.w1 = _SHIFTL(0x06, 24, 8) | _SHIFTL((c), 14, 10) | _SHIFTL((d), 2, 10);       \
 }
 
+#define	gDPLoadTLUTCmd2(pkt, tile, count)				\
+{									\
+	Gfx *_g = (Gfx *)pkt;						\
+									\
+	_g->words.w0 = _SHIFTL(G_LOADTLUT, 24, 8) | 0xff0;			\
+	_g->words.w1 = _SHIFTL((tile), 24, 3) | _SHIFTL((count), 14, 10) | 0xff0;\
+}
+
 /*
  * Texturing macro Overrides
  */

include/math.h

@@ -45,9 +45,9 @@
 
 
 /* Half of PI. (PI/2)*/
-#define M_HALF_PI       M_PI_F / 2
+#define M_HALF_PI       (M_PI_F / 2)
 /* 3 Halves of PI. (3*(PI/2))*/
-#define M_THREE_HALF_PI 3 * M_HALF_PI
+#define M_THREE_HALF_PI (3 * M_HALF_PI)
 
 
 #define M_U16_MAX_VALUE_F 65536.0f
@@ -68,6 +68,8 @@
 #define RAD2BYTE(RAD)         (char)(256.0f / M_TAU_F * (RAD))
 /* Converts an angle from Degrees to Radians */
 #define DegToRad(DEG)         (float)((DEG) * M_TAU_F / 360.0f)
+/* Converts an angle from Degrees to Radians with only one multiply*/
+#define DegToRad1Fact(DEG)         (float)((DEG) * (float)(M_TAU / 360.0))
 /* Converts and halves an angle from Degrees to Radians */
 #define mDegToHalfRad(x)      ((x * M_PI_F) / 360.0f)
 /* Converts an angle from Radians to Degrees */