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--- opengl_20programming [2018/04/13 16:17] – Added syntax highlighting richardrussell
+++ opengl_20programming [2024/01/05 00:22] (current) – external edit 127.0.0.1
@@ Line 91: / Line 91: @@
 </code>
-Note particularly that each //double// parameter must be passed as a pair of values, the first using **FN_dl** and the second using **FN_dh**. When there is a choice, passing single-precision values will usually be easier.\\ \\  Some OpenGL functions require an array of values. In this case it is easier to pass a double-precision array, since BBC BASIC for Windows supports this data type natively (in ***FLOAT64** mode). For example to call **glLoadMatrixd** you would use code similar to the following:
+Note particularly that each //double// parameter must be passed as a pair of values, the first using **FN_dl** and the second using **FN_dh**. When there is a choice, passing single-precision values will usually be easier.\\ \\  Some OpenGL functions require an array of values. In this case it is easier to pass a double-precision array, since BBC BASIC for Windows supports this data type natively (by using the # suffix). For example to call **glLoadMatrixd** you would use code similar to the following:
 <code bb4w>
-        DIM matrix(3,3)
+        DIM matrix#(3,3)
-        matrix() = a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15
+        matrix#() = a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15
-        matrix() *= 1.0
+        matrix#() *= 1.0
-        SYS `glLoadMatrixd`, ^matrix(0,0)
+        SYS `glLoadMatrixd`, ^matrix#(0,0)
 </code>
-Note that for this to work your program must be in ***FLOAT64** mode.\\ \\
 ===== Rendering =====
 \\  OpenGL under Windows uses a //double-buffering// scheme. Objects are first rendered to an off-screen bitmap and then, when the entire frame is complete, //swapped// onto the display. The rendering loop will typically be of the following form: