X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=src%2Fgaw%2Fgawswtnl.c;h=c307f8a53415e819168e2b6d810e08a34087e8f0;hb=3bf187fe037df34459f04bf4e625f38afb80fcf8;hp=5e556217d93e4438abf0ae37693acd1b6f20e801;hpb=5f50ec3c542ea29211591d4865bdaf1368f8c649;p=retroray

diff --git a/src/gaw/gawswtnl.c b/src/gaw/gawswtnl.c
index 5e55621..c307f8a 100644
--- a/src/gaw/gawswtnl.c
+++ b/src/gaw/gawswtnl.c
@@ -100,6 +100,11 @@ void gaw_viewport(int x, int y, int w, int h)
 	st.vport[3] = h;
 }
 
+void gaw_get_viewport(int *vp)
+{
+	memcpy(vp, st.vport, sizeof st.vport);
+}
+
 void gaw_matrix_mode(int mode)
 {
 	st.mmode = mode;
@@ -182,7 +187,7 @@ void gaw_rotate(float deg, float x, float y, float z)
 {
 	static float m[16];
 
-	float angle = M_PI * deg / 180.0f;
+	float angle = CGM_PI * deg / 180.0f;
 	float sina = sin(angle);
 	float cosa = cos(angle);
 	float one_minus_cosa = 1.0f - cosa;
@@ -261,7 +266,7 @@ void gaw_perspective(float vfov_deg, float aspect, float znear, float zfar)
 {
 	static float m[16];
 
-	float vfov = M_PI * vfov_deg / 180.0f;
+	float vfov = CGM_PI * vfov_deg / 180.0f;
 	float s = 1.0f / tan(vfov * 0.5f);
 	float range = znear - zfar;
 
@@ -316,6 +321,11 @@ void gaw_alpha_func(int func, float ref)
 	/* TODO */
 }
 
+void gaw_zoffset(float offs)
+{
+	st.zoffs = offs * 0.1;
+}
+
 #define CLAMP(x, a, b)		((x) < (a) ? (a) : ((x) > (b) ? (b) : (x)))
 
 void gaw_clear_color(float r, float g, float b, float a)
@@ -535,6 +545,9 @@ void gaw_draw_indexed(int prim, const unsigned int *idxarr, int nidx)
 			float oow = 1.0f / v[i].w;
 			v[i].x *= oow;
 			v[i].y *= oow;
+			if(st.opt & (1 << GAW_POLYGON_OFFSET)) {
+				v[i].z += st.zoffs;
+			}
 			if(st.opt & (1 << GAW_DEPTH_TEST)) {
 				v[i].z *= oow;
 			}