+void g3d_normal(float x, float y, float z)
+{
+ st->imm_curv.nx = x;
+ st->imm_curv.ny = y;
+ st->imm_curv.nz = z;
+}
+
+#define CLAMP(x, a, b) ((x) < (a) ? (a) : ((x) > (b) ? (b) : (x)))
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+
+void g3d_color3b(unsigned char r, unsigned char g, unsigned char b)
+{
+ st->imm_curv.r = MIN(r, 255);
+ st->imm_curv.g = MIN(g, 255);
+ st->imm_curv.b = MIN(b, 255);
+ st->imm_curv.a = 255;
+}
+
+void g3d_color4b(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
+{
+ st->imm_curv.r = MIN(r, 255);
+ st->imm_curv.g = MIN(g, 255);
+ st->imm_curv.b = MIN(b, 255);
+ st->imm_curv.a = MIN(a, 255);
+}
+
+void g3d_color3f(float r, float g, float b)
+{
+ int ir = r * 255.0f;
+ int ig = g * 255.0f;
+ int ib = b * 255.0f;
+ st->imm_curv.r = CLAMP(ir, 0, 255);
+ st->imm_curv.g = CLAMP(ig, 0, 255);
+ st->imm_curv.b = CLAMP(ib, 0, 255);
+ st->imm_curv.a = 255;
+}
+
+void g3d_color4f(float r, float g, float b, float a)
+{
+ int ir = r * 255.0f;
+ int ig = g * 255.0f;
+ int ib = b * 255.0f;
+ int ia = a * 255.0f;
+ st->imm_curv.r = CLAMP(ir, 0, 255);
+ st->imm_curv.g = CLAMP(ig, 0, 255);
+ st->imm_curv.b = CLAMP(ib, 0, 255);
+ st->imm_curv.a = CLAMP(ia, 0, 255);
+}
+
+void g3d_texcoord(float u, float v)
+{
+ st->imm_curv.u = u;
+ st->imm_curv.v = v;
+}
+