first commit

project/fm_viewer/fav/shaders/defish2d.fsh

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+uniform sampler2D u_Texture0;
+uniform sampler2D u_Texture1;
+uniform sampler2D u_Texture2;
+// TOP DOWN 360 MODEL
+// https://github.com/tokoik/fisheye ...
+// https://stackoverflow.com/questions/39352533/android-opengl-es-textured-half-sphere ???
+varying vec2 v_TexCoords0;
+varying vec2 v_TexCoords1;
+varying vec2 v_TexCoords2;
+
+#define v_TexCoords1 v_TexCoords0
+#define v_TexCoords2 v_TexCoords0
+#define v_TexCoords3 v_TexCoords0
+
+uniform float u_opacity;
+uniform mat4 u_colorMatrix;
+
+uniform int u_mode;
+uniform float u_angle;
+uniform int u_flip;
+uniform float u_effectiveWidth;
+uniform float u_clipBound;
+uniform float u_whratio;
+void main(void)
+{
+    vec2 fc = v_TexCoords0.st;
+    float PI = 3.141592;
+
+    // FLIP 반전
+//    if(u_mode != 2 && u_flip == 1) {
+//        fc.y = 1.0 - fc.y;
+//    }
+
+    // VR + PANORAMA
+    // #if (REMOVE_360_WIDE_SINGLE)
+    //if(u_mode == 3 || u_mode == 1)
+    if(u_mode == 2 || u_mode == 3)
+    {
+        float R = u_effectiveWidth / 2.0 * 0.99;//0.5;
+        float Cfx = u_effectiveWidth / 2.0;
+        float Cfy = 0.5;
+
+        float He = 1.0;
+        float We = u_effectiveWidth;
+
+        float Xe = 1.0-fc.x;    // flip h
+        float Ye = 1.0-fc.y;    // upside down
+
+//        if(u_mode == 3){
+//            if(Ye > 0.62) {
+//                gl_FragColor = vec4(0.0,0.0,0.0,1.0);
+//                return;
+//            }
+//            Ye = (Ye / 0.62);
+//        }
+
+        float r = Ye/He*R;
+        float theta = Xe/We*2.0*PI - (u_angle * 3.0); // TOP_DOWN_2D_360
+
+        theta = theta * 0.2 * u_whratio;
+
+        float Xf = Cfx+r*sin(theta);
+        float Yf = Cfy+r*cos(theta);
+
+        fc = vec2(Xf,Yf);
+    }
+    else if(u_mode == 1) // PANORAMA 2CH
+    {
+        fc.y = 1.0 - fc.y;
+
+        float Hf = 1.0;
+        float R = u_effectiveWidth / 2.0 * 0.99;
+        float Cfx = u_effectiveWidth / 2.0;
+        float Cfy = 0.5;
+
+        float He = 1.0;
+        float We = u_effectiveWidth;
+
+        float Xe = 1.0-fc.x;    // flip h
+        float Ye = 1.0-fc.y;    // upside down
+
+        if(fc.y < 0.5) // top (0~180 -> bottom
+        {
+            Ye = 1.0-Ye;
+
+            float scale = (Ye + 0.5) * 2.0;   // 0.0~0.5 = 1.0~2.0
+            float r = ((Ye/He*R)+0.25) / scale;
+            float theta = Xe/We*PI+(PI/2.0); // 1/2
+            theta += PI;
+            float Xf = Cfx+r*sin(theta) * scale * 1.0;
+            float Yf = Cfy+r*cos(theta) * scale;
+
+            fc = vec2(Xf,Yf);
+        }
+        else // bottom 180 ~ 360
+        {
+            Ye = 1.0-Ye-0.5;
+            float scale = (Ye + 0.5) * 2.0;   // 0.0~0.5 = 1.0~2.0
+            float r = ((Ye/He*R)+0.25) / scale;
+            float theta = Xe/We*PI+(PI/2.0); // 1/2
+            float Xf = Cfx+r*sin(theta) * scale;
+            float Yf = Cfy+r*cos(theta) * scale;
+
+            fc = vec2(Xf,Yf);
+        }
+
+        if(u_clipBound > 0.0) {
+            //if(v_TexCoords0.st.x < u_clipBound || v_TexCoords0.st.x > (1.0 - u_clipBound))
+            if(v_TexCoords0.st.x < 0.0 || v_TexCoords0.st.x > 1.0)
+            {
+                gl_FragColor = clamp(u_colorMatrix
+                                         * vec4(texture2D(u_Texture0, fc).r,
+                                                texture2D(u_Texture1, fc).r,
+                                                texture2D(u_Texture2, fc).r,
+                                                1.0) * 0.9, 0.0, 1.0);
+                return;
+            }
+        }
+
+    }
+    else // CLIP ZOOM
+    {
+        // ZOOM CLIP
+        if (fc.x < 0.0 || fc.x > 1.0) {
+            gl_FragColor = vec4(0.0,0.0,0.0,1.0);
+            return;
+        }
+        fc.x *= u_effectiveWidth;
+    }
+
+
+
+    gl_FragColor = clamp(u_colorMatrix
+                             * vec4(texture2D(u_Texture0, fc).r,
+                                    texture2D(u_Texture1, fc).r,
+                                    texture2D(u_Texture2, fc).r,
+                                    1.0), 0.0, 1.0);
+
+}