using UnityEngine; /// <summary> /// Utility class for generating distance maps from anti-aliased alpha maps. /// </summary> public static class CCDistanceMapGenerator { /// <summary> /// How to fill the RGB channels of the generated distance map /// </summary> public enum RGBMode { /// <summary> /// Set the RGB channels to 1. /// </summary> White, /// <summary> /// Set the RGB channels to 0. /// </summary> Black, /// <summary> /// Set the RGB channels to the computed distance. /// </summary> Distance, /// <summary> /// Copy the source texture's RGB channels. /// </summary> Source } private class Pixel { public float alpha, distance; public Vector2 gradient; public int dX, dY; } private static int width, height; private static Pixel[,] pixels; /// <summary> /// Generates a distance texture from the alpha channel of a source texture. /// </summary> /// <param name="source"> /// The source texture. Alpha values of 1 are considered inside, values of 0 are considered outside, and any other values are considered /// to be on the edge. Make sure the texture is readable and not compressed. /// </param> /// <param name="destination"> /// The destination texture. Must be the same size as the source texture. /// </param> /// <param name="maxInside"> /// The maximum pixel distance measured inside the boundary, resulting in an alpha value of 1. /// If set to zero, everything inside will have an alpha value of 1. /// </param> /// <param name="maxOutside"> /// The maximum pixel distance measured outside the boundary, resulting in an alpha value of 0. /// If set to zero, everything outside will have an alpha value of 0. /// </param> /// <param name="postProcessDistance"> /// Pixel distance from the boundary which will be post-processed using the boundary gradient. /// </param> /// <param name="rgbMode"> /// How to fill the destination texture's RGB channels. /// </param> public static void Generate (Texture2D source, Texture2D destination, float maxInside, float maxOutside, float postProcessDistance, RGBMode rgbMode) { if(source.height != destination.height || source.width != destination.width){ Debug.LogError("Source and destination textures must be the same size."); return; } try{ source.GetPixel(0, 0); } catch{ Debug.LogError("Source texture is not read/write enabled."); return; } width = source.width; height = source.height; pixels = new Pixel[width, height]; int x, y; float scale; Color c = rgbMode == RGBMode.White ? Color.white : Color.black; for(y = 0; y < height; y++){ for(x = 0; x < width; x++){ pixels[x, y] = new Pixel(); } } if(maxInside > 0f){ for(y = 0; y < height; y++){ for(x = 0; x < width; x++){ pixels[x, y].alpha = 1f - source.GetPixel(x, y).a; } } ComputeEdgeGradients(); GenerateDistanceTransform(); if(postProcessDistance > 0f){ PostProcess(postProcessDistance); } scale = 1f / maxInside; for(y = 0; y < height; y++){ for(x = 0; x < width; x++){ c.a = Mathf.Clamp01(pixels[x, y].distance * scale); destination.SetPixel(x, y, c); } } } if(maxOutside > 0f){ for(y = 0; y < height; y++){ for(x = 0; x < width; x++){ pixels[x, y].alpha = source.GetPixel(x, y).a; } } ComputeEdgeGradients(); GenerateDistanceTransform(); if(postProcessDistance > 0f){ PostProcess(postProcessDistance); } scale = 1f / maxOutside; if(maxInside > 0f){ for(y = 0; y < height; y++){ for(x = 0; x < width; x++){ c.a = 0.5f + (destination.GetPixel(x, y).a - Mathf.Clamp01(pixels[x, y].distance * scale)) * 0.5f; destination.SetPixel(x, y, c); } } } else{ for(y = 0; y < height; y++){ for(x = 0; x < width; x++){ c.a = Mathf.Clamp01(1f - pixels[x, y].distance * scale); destination.SetPixel(x, y, c); } } } } if(rgbMode == RGBMode.Distance){ for(y = 0; y < height; y++){ for(x = 0; x < width; x++){ c = destination.GetPixel(x, y); c.r = c.a; c.g = c.a; c.b = c.a; destination.SetPixel(x, y, c); } } } else if(rgbMode == RGBMode.Source){ for(y = 0; y < height; y++){ for(x = 0; x < width; x++){ c = source.GetPixel(x, y); c.a = destination.GetPixel(x, y).a; destination.SetPixel(x, y, c); } } } pixels = null; } private static void ComputeEdgeGradients () { float sqrt2 = Mathf.Sqrt(2f); for(int y = 1; y < height - 1; y++){ for(int x = 1; x < width - 1; x++){ Pixel p = pixels[x, y]; if(p.alpha > 0f && p.alpha < 1f){ // estimate gradient of edge pixel using surrounding pixels float g = - pixels[x - 1, y - 1].alpha - pixels[x - 1, y + 1].alpha + pixels[x + 1, y - 1].alpha + pixels[x + 1, y + 1].alpha; p.gradient.x = g + (pixels[x + 1, y].alpha - pixels[x - 1, y].alpha) * sqrt2; p.gradient.y = g + (pixels[x, y + 1].alpha - pixels[x, y - 1].alpha) * sqrt2; p.gradient.Normalize(); } } } } private static float ApproximateEdgeDelta (float gx, float gy, float a) { // (gx, gy) can be either the local pixel gradient or the direction to the pixel if(gx == 0f || gy == 0f){ // linear function is correct if both gx and gy are zero // and still fair if only one of them is zero return 0.5f - a; } // normalize (gx, gy) float length = Mathf.Sqrt(gx * gx + gy * gy); gx = gx / length; gy = gy / length; // reduce symmetrical equation to first octant only // gx >= 0, gy >= 0, gx >= gy gx = Mathf.Abs(gx); gy = Mathf.Abs(gy); if(gx < gy){ float temp = gx; gx = gy; gy = temp; } // compute delta float a1 = 0.5f * gy / gx; if(a < a1){ // 0 <= a < a1 return 0.5f * (gx + gy) - Mathf.Sqrt(2f * gx * gy * a); } if(a < (1f - a1)){ // a1 <= a <= 1 - a1 return (0.5f - a) * gx; } // 1-a1 < a <= 1 return -0.5f * (gx + gy) + Mathf.Sqrt(2f * gx * gy * (1f - a)); } private static void UpdateDistance (Pixel p, int x, int y, int oX, int oY) { Pixel neighbor = pixels[x + oX, y + oY]; Pixel closest = pixels[x + oX - neighbor.dX, y + oY - neighbor.dY]; if(closest.alpha == 0f || closest == p){ // neighbor has no closest yet // or neighbor's closest is p itself return; } int dX = neighbor.dX - oX; int dY = neighbor.dY - oY; float distance = Mathf.Sqrt(dX * dX + dY * dY) + ApproximateEdgeDelta(dX, dY, closest.alpha); if(distance < p.distance){ p.distance = distance; p.dX = dX; p.dY = dY; } } private static void GenerateDistanceTransform () { // perform anti-aliased Euclidean distance transform int x, y; Pixel p; // initialize distances for(y = 0; y < height; y++){ for(x = 0; x < width; x++){ p = pixels[x, y]; p.dX = 0; p.dY = 0; if(p.alpha <= 0f){ // outside p.distance = 1000000f; } else if (p.alpha < 1f){ // on the edge p.distance = ApproximateEdgeDelta(p.gradient.x, p.gradient.y, p.alpha); } else{ // inside p.distance = 0f; } } } // perform 8SSED (eight-points signed sequential Euclidean distance transform) // scan up for(y = 1; y < height; y++){ // |P. // |XX p = pixels[0, y]; if(p.distance > 0f){ UpdateDistance(p, 0, y, 0, -1); UpdateDistance(p, 0, y, 1, -1); } // --> // XP. // XXX for(x = 1; x < width - 1; x++){ p = pixels[x, y]; if(p.distance > 0f){ UpdateDistance(p, x, y, -1, 0); UpdateDistance(p, x, y, -1, -1); UpdateDistance(p, x, y, 0, -1); UpdateDistance(p, x, y, 1, -1); } } // XP| // XX| p = pixels[width - 1, y]; if(p.distance > 0f){ UpdateDistance(p, width - 1, y, -1, 0); UpdateDistance(p, width - 1, y, -1, -1); UpdateDistance(p, width - 1, y, 0, -1); } // <-- // .PX for(x = width - 2; x >= 0; x--){ p = pixels[x, y]; if(p.distance > 0f){ UpdateDistance(p, x, y, 1, 0); } } } // scan down for(y = height - 2; y >= 0; y--){ // XX| // .P| p = pixels[width - 1, y]; if(p.distance > 0f){ UpdateDistance(p, width - 1, y, 0, 1); UpdateDistance(p, width - 1, y, -1, 1); } // <-- // XXX // .PX for(x = width - 2; x > 0; x--){ p = pixels[x, y]; if(p.distance > 0f){ UpdateDistance(p, x, y, 1, 0); UpdateDistance(p, x, y, 1, 1); UpdateDistance(p, x, y, 0, 1); UpdateDistance(p, x, y, -1, 1); } } // |XX // |PX p = pixels[0, y]; if(p.distance > 0f){ UpdateDistance(p, 0, y, 1, 0); UpdateDistance(p, 0, y, 1, 1); UpdateDistance(p, 0, y, 0, 1); } // --> // XP. for(x = 1; x < width; x++){ p = pixels[x, y]; if(p.distance > 0f){ UpdateDistance(p, x, y, -1, 0); } } } } private static void PostProcess (float maxDistance) { // adjust distances near edges based on the local edge gradient for(int y = 0; y < height; y++){ for(int x = 0; x < width; x++){ Pixel p = pixels[x, y]; if((p.dX == 0 && p.dY == 0) || p.distance >= maxDistance){ // ignore edge, inside, and beyond max distance continue; } float dX = p.dX, dY = p.dY; Pixel closest = pixels[x - p.dX, y - p.dY]; Vector2 g = closest.gradient; if(g.x == 0f && g.y == 0f){ // ignore unknown gradients (inside) continue; } // compute hit point offset on gradient inside pixel float df = ApproximateEdgeDelta(g.x, g.y, closest.alpha); float t = dY * g.x - dX * g.y; float u = -df * g.x + t * g.y; float v = -df * g.y - t * g.x; // use hit point to compute distance if(Mathf.Abs(u) <= 0.5f && Mathf.Abs(v) <= 0.5f){ p.distance = Mathf.Sqrt((dX + u) * (dX + u) + (dY + v) * (dY + v)); } } } } }

void main(void) { gl_TexCoord[0].xy = gl_MultiTexCoord0.xy; gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; }

uniform sampler2D texture; const float outline_center = 0.10; const float smooth_center = 0.50; void main(void) { vec4 color = texture2D( texture, gl_TexCoord[0].st ); float dist = color.a; vec3 rgb = color.xyz; float width = fwidth(dist); float alpha = smoothstep(smooth_center - width, smooth_center + width, dist); gl_FragColor = vec4(rgb, alpha); }

#include <stdlib.h> #include <string.h> #include <stdio.h> #include <math.h> #include "edtaa3func.c" // Define some fixed size types. typedef unsigned char uint8; typedef unsigned short uint16; typedef unsigned int uint32; // TGA Header struct to make it simple to dump a TGA to disc. #if defined(_MSC_VER) || defined(__GNUC__) #pragma pack(push, 1) #pragma pack(1) // Dont pad the following struct. #endif typedef struct _TGA_header { uint8 idLength, // Length of optional identification sequence. paletteType, // Is a palette present? (1=yes) imageType; // Image data type (0=none, 1=indexed, 2=rgb, // 3=grey, +8=rle packed). uint16 firstPaletteEntry, // First palette index, if present. numPaletteEntries; // Number of palette entries, if present. uint8 paletteBits; // Number of bits per palette entry. uint16 x, // Horiz. pixel coord. of lower left of image. y, // Vert. pixel coord. of lower left of image. width, // Image width in pixels. height; // Image height in pixels. uint8 depth, // Image color depth (bits per pixel). descriptor; // Image attribute flags. } TGA_header; #if defined(_MSC_VER) || defined(__GNUC__) #pragma pack(pop) #endif int TGA_write( char * filename, unsigned int width, unsigned int height, unsigned char *data ) { TGA_header header; memset( &header, 0, sizeof(TGA_header) ); header.imageType = 3; header.width = width; header.height = height; header.depth = 8; header.descriptor = 0x20; FILE *file; file = fopen(filename, "wb"); if( !file ) { fprintf(stderr, "Failed to write file\n"); return 0; } fwrite( (const char *) &header, sizeof(TGA_header), 1, file ); fwrite( data, sizeof(unsigned char), width * height, file); fclose(file); return 1; } unsigned char *TGA_read( char *filename, unsigned int * width, unsigned int * height, unsigned int * depth ) { FILE *file; unsigned char type[4]; unsigned char info[6]; file = fopen( filename, "rb" ); if( !file ) { return 0; } fread( &type, sizeof (char), 3, file ); fseek( file, 12, SEEK_SET ); fread( &info, sizeof (char), 6, file ); /* Only image type (color) or 3 (greyscale) */ if( type[1] != 0 || (type[2] != 2 && type[2] != 3) ) { fclose( file ); return 0; } *width = info[0] + info[1] * 256; *height = info[2] + info[3] * 256; *depth = info[4] / 8; if( *depth != 1 && *depth != 3 && *depth != 4 ) { fclose(file); return 0; } // Allocate memory for image data unsigned long size = *height * *width * *depth; unsigned char *data = (unsigned char *) malloc( size * sizeof(unsigned char) ); // Read in image data fread( data, sizeof(unsigned char), size, file ); fclose( file ); return data; } unsigned char * make_distance_map( unsigned char *img, unsigned int width, unsigned int height ) { short * xdist = (short *) malloc( width * height * sizeof(short) ); short * ydist = (short *) malloc( width * height * sizeof(short) ); double * gx = (double *) calloc( width * height, sizeof(double) ); double * gy = (double *) calloc( width * height, sizeof(double) ); double * data = (double *) calloc( width * height, sizeof(double) ); double * outside = (double *) calloc( width * height, sizeof(double) ); double * inside = (double *) calloc( width * height, sizeof(double) ); int i; // Convert img into double (data) double img_min = 255, img_max = -255; for( i=0; i<width*height; ++i) { double v = img[i]; data[i] = v; if (v > img_max) img_max = v; if (v < img_min) img_min = v; } // Rescale image levels between 0 and 1 for( i=0; i<width*height; ++i) { data[i] = (img[i]-img_min)/img_max; } // Compute outside = edtaa3(bitmap); % Transform background (0's) computegradient( data, height, width, gx, gy); edtaa3(data, gx, gy, height, width, xdist, ydist, outside); for( i=0; i<width*height; ++i) if( outside[i] < 0 ) outside[i] = 0.0; // Compute inside = edtaa3(1-bitmap); % Transform foreground (1's) memset(gx, 0, sizeof(double)*width*height ); memset(gy, 0, sizeof(double)*width*height ); for( i=0; i<width*height; ++i) data[i] = 1 - data[i]; computegradient( data, height, width, gx, gy); edtaa3(data, gx, gy, height, width, xdist, ydist, inside); for( i=0; i<width*height; ++i) if( inside[i] < 0 ) inside[i] = 0.0; // distmap = outside - inside; % Bipolar distance field unsigned char *out = (unsigned char *) malloc( width * height * sizeof(unsigned char) ); for( i=0; i<width*height; ++i) { outside[i] -= inside[i]; outside[i] = 128+outside[i]*16; if( outside[i] < 0 ) outside[i] = 0; if( outside[i] > 255 ) outside[i] = 255; out[i] = 255 - (unsigned char) outside[i]; } free( xdist ); free( ydist ); free( gx ); free( gy ); free( data ); free( outside ); free( inside ); return out; } int main( int argc, char **argv ) { unsigned int width=0, height=0, depth=0; unsigned char *img = TGA_read("texture.tga", &width, &height, &depth); if (!img) { fprintf( stderr, "Failed to read image !\n" ); return EXIT_FAILURE; } printf("Image dimension: %d x %d x %d\n", width, height, depth); if (depth != 1) { fprintf( stderr, "Image has to be grayscale !\n" ); free(img); return EXIT_FAILURE; } unsigned char *out = make_distance_map(img, width, height); TGA_write("texture-distance.tga", width, height, out); free(img); free(out); return EXIT_SUCCESS; }

/bin/sh bundle.sh GLSL-contourtextures gcc -o GLSL-contourtextures.app/Contents/MacOS/GLSL-contourtextures GLSL-contourtextures.c -lglfw -framework Carbon -framework AGL -framework OpenGL Undefined symbols: ".objc_class_name_NSAutoreleasePool", referenced from: literal-pointer@__OBJC@__cls_refs@NSAutoreleasePool in libglfw.a(cocoa_window.o) literal-pointer@__OBJC@__cls_refs@NSAutoreleasePool in libglfw.a(cocoa_init.o) "_objc_msgSend_fpret", referenced from: -[GLFWContentView mouseMoved:] in libglfw.a(cocoa_window.o) -[GLFWContentView mouseMoved:] in libglfw.a(cocoa_window.o) -[GLFWContentView scrollWheel:] in libglfw.a(cocoa_window.o) __glfwPlatformSetTime in libglfw.a(cocoa_time.o) __glfwPlatformGetTime in libglfw.a(cocoa_time.o) ".objc_class_name_NSBundle", referenced from: literal-pointer@__OBJC@__cls_refs@NSBundle in libglfw.a(cocoa_init.o) ".objc_class_name_NSOpenGLPixelFormat", referenced from: literal-pointer@__OBJC@__cls_refs@NSOpenGLPixelFormat in libglfw.a(cocoa_window.o) ".objc_class_name_NSOpenGLContext", referenced from: literal-pointer@__OBJC@__cls_refs@NSOpenGLContext in libglfw.a(cocoa_window.o) ".objc_class_name_NSString", referenced from: literal-pointer@__OBJC@__cls_refs@NSString in libglfw.a(cocoa_window.o) literal-pointer@__OBJC@__cls_refs@NSString in libglfw.a(cocoa_init.o) ".objc_class_name_NSScreen", referenced from: literal-pointer@__OBJC@__cls_refs@NSScreen in libglfw.a(cocoa_window.o) ".objc_class_name_NSMenu", referenced from: literal-pointer@__OBJC@__cls_refs@NSMenu in libglfw.a(cocoa_init.o) "_objc_msgSend_stret", referenced from: -[GLFWWindowDelegate windowDidResize:] in libglfw.a(cocoa_window.o) -[GLFWWindowDelegate windowDidResize:] in libglfw.a(cocoa_window.o) -[GLFWContentView mouseMoved:] in libglfw.a(cocoa_window.o) __glfwPlatformSetWindowPos in libglfw.a(cocoa_window.o) __glfwPlatformSetWindowPos in libglfw.a(cocoa_window.o) __glfwPlatformSetWindowPos in libglfw.a(cocoa_window.o) __glfwPlatformSetWindowPos in libglfw.a(cocoa_window.o) ".objc_class_name_NSCursor", referenced from: literal-pointer@__OBJC@__cls_refs@NSCursor in libglfw.a(cocoa_window.o) "_objc_msgSendSuper", referenced from: -[GLFWContentView keyDown:] in libglfw.a(cocoa_window.o) -[GLFWApplication sendEvent:] in libglfw.a(cocoa_init.o) ".objc_class_name_NSApplication", referenced from: .objc_class_name_GLFWApplication in libglfw.a(cocoa_init.o) "_objc_msgSend", referenced from: __glfwPlatformPollEvents in libglfw.a(cocoa_window.o) __glfwPlatformPollEvents in libglfw.a(cocoa_window.o) __glfwPlatformPollEvents in libglfw.a(cocoa_window.o) __glfwPlatformPollEvents in libglfw.a(cocoa_window.o) __glfwPlatformPollEvents in libglfw.a(cocoa_window.o) __glfwPlatformPollEvents in libglfw.a(cocoa_window.o) __glfwPlatformWaitEvents in libglfw.a(cocoa_window.o) __glfwPlatformWaitEvents in libglfw.a(cocoa_window.o) __glfwPlatformWaitEvents in libglfw.a(cocoa_window.o) __glfwPlatformRefreshWindowParams in libglfw.a(cocoa_window.o) __glfwPlatformRefreshWindowParams in libglfw.a(cocoa_window.o) __glfwPlatformRefreshWindowParams in libglfw.a(cocoa_window.o) __glfwPlatformRefreshWindowParams in libglfw.a(cocoa_window.o) __glfwPlatformRefreshWindowParams in libglfw.a(cocoa_window.o) __glfwPlatformRefreshWindowParams in libglfw.a(cocoa_window.o) __glfwPlatformRefreshWindowParams in libglfw.a(cocoa_window.o) __glfwPlatformRefreshWindowParams in libglfw.a(cocoa_window.o) __glfwPlatformRefreshWindowParams in libglfw.a(cocoa_window.o) __glfwPlatformSwapInterval in libglfw.a(cocoa_window.o) __glfwPlatformSwapBuffers in libglfw.a(cocoa_window.o) __glfwPlatformRestoreWindow in libglfw.a(cocoa_window.o) __glfwPlatformIconifyWindow in libglfw.a(cocoa_window.o) __glfwPlatformSetWindowSize in libglfw.a(cocoa_window.o) __glfwPlatformSetWindowTitle in libglfw.a(cocoa_window.o) __glfwPlatformSetWindowTitle in libglfw.a(cocoa_window.o) -[GLFWContentView otherMouseDragged:] in libglfw.a(cocoa_window.o) -[GLFWContentView rightMouseDragged:] in libglfw.a(cocoa_window.o) -[GLFWContentView mouseDragged:] in libglfw.a(cocoa_window.o) -[GLFWWindowDelegate windowDidResize:] in libglfw.a(cocoa_window.o) -[GLFWContentView otherMouseUp:] in libglfw.a(cocoa_window.o) -[GLFWContentView otherMouseDown:] in libglfw.a(cocoa_window.o) -[GLFWContentView mouseMoved:] in libglfw.a(cocoa_window.o) -[GLFWContentView mouseMoved:] in libglfw.a(cocoa_window.o) -[GLFWContentView flagsChanged:] in libglfw.a(cocoa_window.o) -[GLFWContentView flagsChanged:] in libglfw.a(cocoa_window.o) -[GLFWContentView keyUp:] in libglfw.a(cocoa_window.o) -[GLFWContentView keyUp:] in libglfw.a(cocoa_window.o) -[GLFWContentView keyUp:] in libglfw.a(cocoa_window.o) -[GLFWContentView keyUp:] in libglfw.a(cocoa_window.o) -[GLFWContentView keyDown:] in libglfw.a(cocoa_window.o) -[GLFWContentView keyDown:] in libglfw.a(cocoa_window.o) -[GLFWContentView keyDown:] in libglfw.a(cocoa_window.o) -[GLFWContentView keyDown:] in libglfw.a(cocoa_window.o) -[GLFWContentView keyDown:] in libglfw.a(cocoa_window.o) __glfwPlatformSetMouseCursorPos in libglfw.a(cocoa_window.o) __glfwPlatformShowMouseCursor in libglfw.a(cocoa_window.o) __glfwPlatformHideMouseCursor in libglfw.a(cocoa_window.o) __glfwPlatformCloseWindow in libglfw.a(cocoa_window.o) __glfwPlatformCloseWindow in libglfw.a(cocoa_window.o) __glfwPlatformCloseWindow in libglfw.a(cocoa_window.o) __glfwPlatformCloseWindow in libglfw.a(cocoa_window.o) __glfwPlatformCloseWindow in libglfw.a(cocoa_window.o) __glfwPlatformCloseWindow in libglfw.a(cocoa_window.o) __glfwPlatformCloseWindow in libglfw.a(cocoa_window.o) __glfwPlatformCloseWindow in libglfw.a(cocoa_window.o) __glfwPlatformCloseWindow in libglfw.a(cocoa_window.o) __glfwPlatformCloseWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformOpenWindow in libglfw.a(cocoa_window.o) __glfwPlatformSetWindowPos in libglfw.a(cocoa_window.o) __glfwPlatformSetWindowPos in libglfw.a(cocoa_window.o) -[GLFWApplication sendEvent:] in libglfw.a(cocoa_init.o) -[GLFWApplication sendEvent:] in libglfw.a(cocoa_init.o) -[GLFWApplication sendEvent:] in libglfw.a(cocoa_init.o) -[GLFWApplication sendEvent:] in libglfw.a(cocoa_init.o) __glfwPlatformTerminate in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) __glfwPlatformInit in libglfw.a(cocoa_init.o) ".objc_class_name_NSWindow", referenced from: literal-pointer@__OBJC@__cls_refs@NSWindow in libglfw.a(cocoa_window.o) ".objc_class_name_NSMenuItem", referenced from: literal-pointer@__OBJC@__cls_refs@NSMenuItem in libglfw.a(cocoa_init.o) ".objc_class_name_NSView", referenced from: .objc_class_name_GLFWContentView in libglfw.a(cocoa_window.o) "_NSApp", referenced from: _NSApp$non_lazy_ptr in libglfw.a(cocoa_window.o) _NSApp$non_lazy_ptr in libglfw.a(cocoa_init.o) (maybe you meant: _NSApp$non_lazy_ptr) ld: symbol(s) not found collect2: ld returned 1 exit status make: *** [GLSL-contourtextures] Error 1