From 08f93839ac1f14827d576c45a1416e10afc29866 Mon Sep 17 00:00:00 2001
From: N0NameN0 <alonetrio@yahoo.com>
Date: Mon, 10 May 2010 18:35:49 +0000
Subject: [PATCH] [ADD] GRRLIB_DrawTessPanel to draw (as the name says) a
 tessellated pannel ;)

---
 GRRLIB/GRRLIB/GRRLIB_3D.c          | 34 ++++++++++++++++++++++++++++++
 GRRLIB/GRRLIB/grrlib/GRRLIB__lib.h |  1 +
 2 files changed, 35 insertions(+)

diff --git a/GRRLIB/GRRLIB/GRRLIB_3D.c b/GRRLIB/GRRLIB/GRRLIB_3D.c
index efc5e5b..0ca028f 100644
--- a/GRRLIB/GRRLIB/GRRLIB_3D.c
+++ b/GRRLIB/GRRLIB/GRRLIB_3D.c
@@ -587,6 +587,40 @@ void GRRLIB_DrawCone(f32 r, f32 h, int d, bool filled, u32 col) {
     GX_End();
 }
 
+/**
+ * Draw a Tesselated pannel (with normal).
+ * @param w Width of the panel.
+ * @param wstep Size of width slices.
+ * @param h Height of the pannel.
+ * @param hstep Size the de height slices.
+ * @param filled Wired or not.
+ * @param col Color of the cone.
+*/
+void GRRLIB_DrawTessPanel(f32 w, f32 wstep, f32 h, f32 hstep, bool filled, u32 col) {
+ f32 x,y,tmpx, tmpy;
+ int tmp;
+ tmpy = h/2.0f;
+ tmpx = w/2.0f;
+ tmp = ((w/wstep)*2)+2;
+    for ( y = -tmpy ; y <= tmpy ; y+=hstep )
+    {
+        if(filled) GX_Begin(GX_TRIANGLESTRIP, GX_VTXFMT0, tmp);
+        else       GX_Begin(GX_LINESTRIP, GX_VTXFMT0, tmp);
+            for ( x = -tmpx ; x <= tmpx ; x+=wstep )
+            {
+                GX_Position3f32( x, y, 0.0f );
+                GX_Normal3f32( 0.0f, 0.0f, 1.0f);
+                GX_Color1u32(col);
+                GX_Position3f32( x, y+hstep, 0.0f );
+                GX_Normal3f32( 0.0f, 0.0f, 1.0f);
+                GX_Color1u32(col);
+            }
+        GX_End();
+    }
+}
+
+
+
 /**
  * Set ambient color.
  * When no diffuse ligth is shinig on a object, the color is equal to ambient color.
diff --git a/GRRLIB/GRRLIB/grrlib/GRRLIB__lib.h b/GRRLIB/GRRLIB/grrlib/GRRLIB__lib.h
index b2f23bf..f3fdfb0 100644
--- a/GRRLIB/GRRLIB/grrlib/GRRLIB__lib.h
+++ b/GRRLIB/GRRLIB/grrlib/GRRLIB__lib.h
@@ -163,6 +163,7 @@ void GRRLIB_DrawSphere(f32 r, int lats, int longs, bool filled, u32 col);
 void GRRLIB_DrawCube(f32 size, bool filled, u32 col);
 void GRRLIB_DrawCylinder(f32 r, f32 h, int d, bool filled, u32 col);
 void GRRLIB_DrawCone(f32 r, f32 h, int d, bool filled, u32 col);
+void GRRLIB_DrawTessPanel(f32 w, f32 wstep, f32 h, f32 hstep, bool filled, u32 col);
 void GRRLIB_SetLightAmbient(u32 ambientcolor);
 void GRRLIB_SetLightDiff(u8 num, guVector pos, f32 distattn, f32 brightness, u32 lightcolor);
 void GRRLIB_SetLightSpec(u8 num, guVector dir, f32 shy, u32 lightcolor, u32 speccolor);