Fix bad texture seems

Src/Graphics/New3D/New3D.cpp

@@ -3,6 +3,7 @@
 #include "Texture.h"
 #include "Vec.h"
 #include <cmath>  // needed by gcc
+#include <algorithm>
 
 #define MAX_RAM_POLYS 100000	
 #define MAX_ROM_POLYS 500000
@@ -790,6 +791,38 @@ void CNew3D::CopyVertexData(const R3DPoly& r3dPoly, std::vector<Poly>& polyArray
 	}
 }
 
+// non smooth texturing on the pro-1000 seems to sample like gl_nearest
+// ie not outside of the texture coordinates, but with bilinear filtering
+// this is about as close as we can emulate in hardware
+// if we don't do this with gl_repeat enabled, it will wrap around and sample the 
+// other side of the texture which produces ugly seems
+void CNew3D::OffsetTexCoords(R3DPoly& r3dPoly, float offset[2])
+{
+	for (int i = 0; i < 2; i++) {
+
+		float min =  FLT_MAX;
+		float max = -FLT_MAX;
+
+		if (!offset[i]) continue;
+
+		for (int j = 0; j < r3dPoly.number; j++) {
+			min = std::min(r3dPoly.v[j].texcoords[i], min);
+			max = std::max(r3dPoly.v[j].texcoords[i], max);
+		}
+
+		for (int j = 0; j < r3dPoly.number && min != max; j++) {
+
+			if (r3dPoly.v[j].texcoords[i] == min) {
+				r3dPoly.v[j].texcoords[i] += offset[i];
+			}
+
+			if (r3dPoly.v[j].texcoords[i] == max) {
+				r3dPoly.v[j].texcoords[i] -= offset[i];
+			}
+		}
+	}
+}
+
 void CNew3D::CacheModel(Model *m, const UINT32 *data)
 {
 	Vertex			prev[4];
@@ -984,6 +1017,24 @@ void CNew3D::CacheModel(Model *m, const UINT32 *data)
 			data += 4;
 		}
 
+		// check if we need to modify the texture coordinates
+		{
+			float offset[2] = { 0 };
+
+			if (ph.TexEnabled()) {
+
+				if (!ph.TexSmoothU() && !ph.TexUMirror()) {
+					offset[0] = 0.5f / ph.TexWidth();	// half texel
+				}
+
+				if (!ph.TexSmoothV() && !ph.TexVMirror()) {
+					offset[1] = 0.5f / ph.TexHeight();	// half texel
+				}
+
+				OffsetTexCoords(p, offset);
+			}
+		}
+
 		// Copy current vertices into previous vertex array
 		for (i = 0; i < 4 && validPoly; i++) {
 			prev[i] = p.v[i];
@@ -1071,3 +1122,4 @@ bool CNew3D::IsVROMModel(UINT32 modelAddr)
 }
 
 } // New3D
+

Src/Graphics/New3D/New3D.h

@@ -169,6 +169,7 @@ private:
 	// building the scene
 	void CacheModel(Model *m, const UINT32 *data);
 	void CopyVertexData(const R3DPoly& r3dPoly, std::vector<Poly>& polyArray);
+	void OffsetTexCoords(R3DPoly& r3dPoly, float offset[2]);
 
 	void RenderScene(int priority, bool alpha);
 	float Determinant3x3(const float m[16]);

Src/Graphics/New3D/PolyHeader.h

@@ -51,13 +51,11 @@ xxxxxxxx xxxxxxxx xxxxxxxx --------		Color(RGB888)
 -------- -------- -------- x-------		Color disabled
 -------- -------- -------- -x------		Texture page
 -------- -------- -------- ---xxxxx		Upper 5 bits of texture U coordinate
--------- -------- -------- --x-----		?
 
 0x05 : 
 xxxxxxxx xxxxxxxx xxxxxxxx --------		Specular color ?
 -------- -------- -------- x-------		Low bit of texture U coordinate
 -------- -------- -------- ---xxxxx		Low 5 bits of texture V coordinate
--------- -------- -------- -xx-----		?
 
 0x06: 
 x------- -------- -------- --------		Alpha testing / contour