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-rw-r--r--3rdparty/bgfx/examples/41-tess/matrices.sh68
1 files changed, 68 insertions, 0 deletions
diff --git a/3rdparty/bgfx/examples/41-tess/matrices.sh b/3rdparty/bgfx/examples/41-tess/matrices.sh
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+++ b/3rdparty/bgfx/examples/41-tess/matrices.sh
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+
+
+//I decided to keep the non square matrices definition in the example, since I am still not sure how non square matrices should be treated in bgfx (Daniel Gavin)
+
+#ifndef MATRICES_H_HEADER_GUARD
+#define MATRICES_H_HEADER_GUARD
+
+#ifndef __cplusplus
+
+#if BGFX_SHADER_LANGUAGE_HLSL || BGFX_SHADER_LANGUAGE_PSSL || BGFX_SHADER_LANGUAGE_SPIRV || BGFX_SHADER_LANGUAGE_METAL
+
+# define mat3x4 float4x3
+# define mat4x3 float3x4
+
+#else
+
+
+#endif // BGFX_SHADER_LANGUAGE_*
+
+mat4x3 mtxFromRows(vec4 _0, vec4 _1, vec4 _2)
+{
+#if BGFX_SHADER_LANGUAGE_GLSL
+ return transpose(mat3x4(_0, _1, _2) );
+#else
+ return mat4x3(_0, _1, _2);
+#endif // BGFX_SHADER_LANGUAGE_GLSL
+}
+
+vec4 mtxGetRow(mat4x3 _0, uint row)
+{
+#if BGFX_SHADER_LANGUAGE_GLSL
+ return vec4(_0[0][row], _0[1][row], _0[2][row], _0[3][row]);
+#else
+ return vec4(_0[row]);
+#endif // BGFX_SHADER_LANGUAGE_GLSL
+}
+
+vec4 mtxGetRow(mat4 _0, uint row)
+{
+#if BGFX_SHADER_LANGUAGE_GLSL
+ return vec4(_0[0][row], _0[1][row], _0[2][row], _0[3][row]);
+#else
+ return vec4(_0[row]);
+#endif // BGFX_SHADER_LANGUAGE_GLSL
+}
+
+vec4 mtxGetColumn(mat4 _0, uint column)
+{
+#if BGFX_SHADER_LANGUAGE_GLSL
+ return vec4(_0[column]);
+#else
+ return vec4(_0[0][column], _0[1][column], _0[2][column], _0[3][column]);
+#endif // BGFX_SHADER_LANGUAGE_GLSL
+}
+
+float mtxGetElement(mat4 _0, uint column, uint row)
+{
+#if BGFX_SHADER_LANGUAGE_GLSL
+ return _0[column][row];
+#else
+ return _0[row][column];
+#endif // BGFX_SHADER_LANGUAGE_GLSL
+}
+
+
+#endif // __cplusplus
+
+#endif // MATRICES_H_HEADER_GUARD