Allow symlinked frame files. Useful for testing.

[nageru] / equations.frag

diff --git a/equations.frag b/equations.frag
index ae32ed7fd72e48b166211a828a3d331335827a45..04e5370fd9d53baf5afda39ee140a526d6937945 100644 (file)
--- a/equations.frag
+++ b/equations.frag
@@ -1,12 +1,14 @@
 #version 450 core
 
-in vec2 tc, tc_left, tc_down;
-out uvec4 equation;
+in vec3 tc0, tc_left0, tc_down0;
+in vec3 tc1, tc_left1, tc_down1;
+in float line_offset;
+out uvec4 equation_red, equation_black;
 
-uniform sampler2D I_x_y_tex, I_t_tex;
-uniform sampler2D diff_flow_tex, base_flow_tex;
-uniform sampler2D beta_0_tex;
-uniform sampler2D diffusivity_tex;
+uniform sampler2DArray I_x_y_tex, I_t_tex;
+uniform sampler2DArray diff_flow_tex, base_flow_tex;
+uniform sampler2DArray beta_0_tex;
+uniform sampler2DArray diffusivity_tex;
 
 // Relative weighting of intensity term.
 uniform float delta;
@@ -65,7 +67,7 @@ float zero_if_outside_border(vec4 val)
        }
 }
 
-void main()
+uvec4 compute_equation(vec3 tc, vec3 tc_left, vec3 tc_down)
 {
        // Read the flow (on top of the u0/v0 flow).
        float du, dv;
@@ -161,8 +163,25 @@ void main()
        b2 += laplacian.y;
 
        // Encode the equation down into four uint32s.
-       equation.x = floatBitsToUint(1.0 / A11);
-       equation.y = floatBitsToUint(A12);
-       equation.z = floatBitsToUint(1.0 / A22);
-       equation.w = pack_floats_shared(b1, b2);
+       uvec4 ret;
+       ret.x = floatBitsToUint(1.0 / A11);
+       ret.y = floatBitsToUint(A12);
+       ret.z = floatBitsToUint(1.0 / A22);
+       ret.w = pack_floats_shared(b1, b2);
+       return ret;
+}
+
+void main()
+{
+       uvec4 eq0 = compute_equation(tc0, tc_left0, tc_down0);
+       uvec4 eq1 = compute_equation(tc1, tc_left1, tc_down1);
+
+       if ((int(round(line_offset)) & 1) == 1) {
+               // Odd line, so the right value is red.
+               equation_red = eq1;
+               equation_black = eq0;
+       } else {
+               equation_red = eq0;
+               equation_black = eq1;
+       }
 }