added linear interpolation in image to use it at the terrain generation

[demo] / src / image.h

diff --git a/src/image.h b/src/image.h
index ec5228d..3f3ba54 100644 (file)
--- a/src/image.h
+++ b/src/image.h
@@ -27,8 +27,10 @@ public:
 
        bool load(const char *fname);
 
+       Vec4 get_pixel(int x, int y) const;
+
        Vec4 lookup_nearest(float u, float v) const;
-       //TODO lookup_linear
+       Vec4 lookup_linear(float u, float v, float du, float dv) const;
 };
 
 #endif // IMAGE_H_
\ No newline at end of file