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Fix the blend test sample. We're using a perspective projection where -Z goes into the screen, so we need to shift positive

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Luke Benstead 2020-05-14 07:08:56 +01:00
parent db079fdc39
commit 06acff400c
1 changed files with 2 additions and 3 deletions
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5
samples/blend_test/main.c
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@ -79,12 +79,11 @@ void DrawGLScene()
// RIGHT SECTION
// This should draw 2 quad, a red first, then and overlapping blue one.
// This section uses a LOWER Z VALUE(-0.01f), so the blue quad should be in FRONT of the red quad.
// lerabot's note : changing the z value to positive gives the desired output.
// This section uses a HIGHER Z VALUE(0.01f), so the blue quad should be in FRONT of the red quad.
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
DrawQuad(RED);
glTranslatef(1.0, 0, -0.01);
glTranslatef(1.0, 0, 0.01);
DrawQuad(BLUE);
glDisable(GL_BLEND);