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  • glGenBuffers not defined?

    - by user146780
    I'm using windows and I notice that a lot of functions are grayed out because I guess #ifdef GL_GLEXT_PROTOTYPES is not defined. One of these is the VBO extension. Should I just define GL_GLEXT_PROTOTYPES? Otherwise how else can I use VBOs since im using OpenGL32.dll (I want my application to have no dll dependencies not included in Windows by default.) Thanks

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  • Why does this code sometimes return NaN?

    - by carrots
    This often returns NAN ("Not A Number") depending on input: #define PI 3.1415f GLfloat sineEaseIn(GLfloat ratio) { return 1.0f-cosf(ratio * (PI / 2.0f)); } I tried making PI a few digits smaller to see if that would help. No dice. Then I thought it might be a datatype mismatch, but float and glfloat seem to be equivalent: gl.h typedef float GLfloat; math.h extern float cosf( float ); Is this a casting issue?

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  • lwjgl 101: How can I use VBOs?

    - by Vuntic
    How can I draw anything in lwjgl using VBOs? When I follow the tutorial, it just breaks. I've also tried running this example (with the byteorder fix) but it just displays a blank window. SO hasn't been helpful to me yet, but this is the last place I can think of that might have an answer...

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  • How to get right values from Views touch event

    - by Pinker
    I have a problem with implementing touch events on GLSurfaceView. Views size is 1280x696, because of android (tablet) status bar at bottom with soft keys, time etc.., (screen resolution is 1280x800), but OnTouchListener is receiving touch events with coords [646.0,739.0], and thus my gluunproject method fails to return correct values is there any way to return events that respect these boundaries? or how should I recalculate the position?

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  • Set Renderbuffer Width and Height (Open GL ES)

    - by Josh Elsasser
    I'm currently experiencing an issue with an Open GL ES renderbuffer where the backing and width are are both set to 15. Is there any way to set them to the width of 320 and 480? My project is built up on Apple's EAGLView class and ES1Renderer, but I've moved it from the app delegate to a controller. I also moved the CADisplayLink outside of it (I update my game logic with the timestamp from this) Any help would be greatly appreciated. I add the glview to the window as follows: CGRect applicationFrame = [[UIScreen mainScreen] applicationFrame]; [window addSubview:gameController.glview]; [window makeKeyAndVisible]; I synthesize the controller and the glview within it. The EAGLView and Renderer are otherwise unmodified. Renderer Initialization: // Get the layer CAEAGLLayer *eaglLayer = (CAEAGLLayer *)self.layer; eaglLayer.opaque = TRUE; eaglLayer.drawableProperties = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithBool:FALSE], kEAGLDrawablePropertyRetainedBacking, kEAGLColorFormatRGBA8, kEAGLDrawablePropertyColorFormat, nil]; renderer = [[ES1Renderer alloc] init]; Render "resize from layer" Method - (BOOL)resizeFromLayer:(CAEAGLLayer *)layer { // Allocate color buffer backing based on the current layer size glBindRenderbufferOES(GL_RENDERBUFFER_OES, colorRenderbuffer); [context renderbufferStorage:GL_RENDERBUFFER_OES fromDrawable:layer]; glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_WIDTH_OES, &backingWidth); glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_HEIGHT_OES, &backingHeight); NSLog(@"Backing Width:%i and Height: %i", backingWidth, backingHeight); if (glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES) != GL_FRAMEBUFFER_COMPLETE_OES) { NSLog(@"Failed to make complete framebuffer object %x", glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES)); return NO; } return YES; }

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  • my first shader in WebGL

    - by Diego
    Hello, I am writing my first shader in WebGL. I was wondering if the GLSL language has any way to evaluate if an attribute or a uniform is null. According to the specs it does not support to do something like if (attributeX) { dothis(); } else{ dothat(): } And I think it would be a waste to write a bool attribute for each of these cases would be a waste. Another question: what happen during rendering when you don't pass along the uniforms or attribs to the shader? Thanks!

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  • Renderbuffer Width (Open GL ES)

    - by Josh Elsasser
    I'm currently experiencing an issue with an Open GL ES renderbuffer where the backing and width are are both set to 15. Is there any way to set them to the width of 320 and 480? My project is built up on Apple's EAGLView class and ES1Renderer, but I've moved it from the app delegate to a controller. I also moved the CADisplayLink outside of it (I update my game logic with the timestamp from this) Any help would be greatly appreciated. I add the glview to the window as follows: CGRect applicationFrame = [[UIScreen mainScreen] applicationFrame]; [window addSubview:gameController.glview]; [window makeKeyAndVisible]; I synthesize the controller and the glview within it. The EAGLView and Renderer are otherwise unmodified. Renderer Initialization: // Get the layer CAEAGLLayer *eaglLayer = (CAEAGLLayer *)self.layer; eaglLayer.opaque = TRUE; eaglLayer.drawableProperties = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithBool:FALSE], kEAGLDrawablePropertyRetainedBacking, kEAGLColorFormatRGBA8, kEAGLDrawablePropertyColorFormat, nil]; renderer = [[ES1Renderer alloc] init]; Render "resize from layer" Method - (BOOL)resizeFromLayer:(CAEAGLLayer *)layer { // Allocate color buffer backing based on the current layer size glBindRenderbufferOES(GL_RENDERBUFFER_OES, colorRenderbuffer); [context renderbufferStorage:GL_RENDERBUFFER_OES fromDrawable:layer]; glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_WIDTH_OES, &backingWidth); glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_HEIGHT_OES, &backingHeight); NSLog(@"Backing Width:%i and Height: %i", backingWidth, backingHeight); if (glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES) != GL_FRAMEBUFFER_COMPLETE_OES) { NSLog(@"Failed to make complete framebuffer object %x", glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES)); return NO; } return YES; }

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  • Filling in gaps for outlines

    - by user146780
    I'm using an algorithm to generate quads. These become outlines. The algorithm is: void OGLENGINEFUNCTIONS::GenerateLinePoly(const std::vector<std::vector<GLdouble>> &input, std::vector<GLfloat> &output, int width) { output.clear(); if(input.size() < 2) { return; } int temp; float dirlen; float perplen; POINTFLOAT start; POINTFLOAT end; POINTFLOAT dir; POINTFLOAT ndir; POINTFLOAT perp; POINTFLOAT nperp; POINTFLOAT perpoffset; POINTFLOAT diroffset; POINTFLOAT p0, p1, p2, p3; for(unsigned int i = 0; i < input.size() - 1; ++i) { start.x = static_cast<float>(input[i][0]); start.y = static_cast<float>(input[i][1]); end.x = static_cast<float>(input[i + 1][0]); end.y = static_cast<float>(input[i + 1][1]); dir.x = end.x - start.x; dir.y = end.y - start.y; dirlen = sqrt((dir.x * dir.x) + (dir.y * dir.y)); ndir.x = static_cast<float>(dir.x * 1.0 / dirlen); ndir.y = static_cast<float>(dir.y * 1.0 / dirlen); perp.x = dir.y; perp.y = -dir.x; perplen = sqrt((perp.x * perp.x) + (perp.y * perp.y)); nperp.x = static_cast<float>(perp.x * 1.0 / perplen); nperp.y = static_cast<float>(perp.y * 1.0 / perplen); perpoffset.x = static_cast<float>(nperp.x * width * 0.5); perpoffset.y = static_cast<float>(nperp.y * width * 0.5); diroffset.x = static_cast<float>(ndir.x * 0 * 0.5); diroffset.y = static_cast<float>(ndir.y * 0 * 0.5); // p0 = start + perpoffset - diroffset //p1 = start - perpoffset - diroffset //p2 = end + perpoffset + diroffset // p3 = end - perpoffset + diroffset p0.x = start.x + perpoffset.x - diroffset.x; p0.y = start.y + perpoffset.y - diroffset.y; p1.x = start.x - perpoffset.x - diroffset.x; p1.y = start.y - perpoffset.y - diroffset.y; p2.x = end.x + perpoffset.x + diroffset.x; p2.y = end.y + perpoffset.y + diroffset.y; p3.x = end.x - perpoffset.x + diroffset.x; p3.y = end.y - perpoffset.y + diroffset.y; output.push_back(p2.x); output.push_back(p2.y); output.push_back(p0.x); output.push_back(p0.y); output.push_back(p1.x); output.push_back(p1.y); output.push_back(p3.x); output.push_back(p3.y); } } The problem is that there are then gaps as seen here: http://img816.imageshack.us/img816/2882/eeekkk.png There must be a way to fix this. I see a pattern but I just cant figure it out. There must be a way to fill the missing inbetweens. Thanks

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  • Texturing Issue when Overlaying images onto Camera preview SurfaceView

    - by Dervis Suleyman
    I am in the process of making an augmented reality application and I have successfully overlaid a 3d cube over a camera surface view. The Issue now is when I add a Texture the cube then flickers(with the texture on it) and disappears leaving the camera preview upon further research i discovered that the cube with the texture was disappearing behind the Camera preview. My Question is has anyone else had this issue and if yes what approach did you take to solve this. Heres another strange Issue when i take a print screen the cube is on-top of the camera Preview

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  • Rendering splash screen on the iPhone using Open GL ES

    - by Rich
    Hi, I want to render a splash screen on the iPhone whilst using an Open GL view. The iPhone screen as we know is 320x480, which is not a power of 2. Before I enter into the world of chopping the texture up and rendering sub parts, or embedding the screen on another texture page I was wondering if there was another way? Is it possible to overlay another view that I could render to using CoreGraphics functions? Or is it possible to render to a Open GL surface using Core Graphics functions. What would you recommend? Cheers Rich

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  • From a Maya scene to a WebGL animation, where to start?

    - by Tower
    Hi, I've got some time, and I really would like to learn to get my Maya animated scenes into WebGL. I'm not sure where to start really. It would be amazing if I could make a Canvas element and place a Maya scene into it so that it's animating. Does anyone got a tutorial or some hints? PS. Answers about 3ds Max are also welcome!

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  • How do games move around objects (in general)

    - by user146780
    I'm sure there's not just 1 answer to this but, do game engines actually change the vectors in memory, or use gltransformations? Because pushing and popping the matrix all the time seems inefficient, but if you keep modifying the verticies you cant make use of display lists. So I'm wondering how it's done in general. Thanks

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  • Normals per index?

    - by WarrenFaith
    I have a pyramid which has 5 vertex and 18 indices. As I want to add normals to each face I just found solution for normals for each vertex. That means I can't use indices to define my pyramid I need to have 18 vertex (and 3 times the same vertex for the same point in space). There must be a solution to use normals not on vertex base but on index base. Some code (javascript): var vertices = [ -half, -half, half, // 0 front left half, -half, half, // 1 front right half, -half, -half, // 2 back right -half, -half, -half, // 3 back left 0.0, Math.sqrt((size * size) - (2 * (half * half))) - half, 0.0 // 4 top ]; var vertexNormals = [ // front face normaleFront[0], normaleFront[1], normaleFront[2], normaleFront[0], normaleFront[1], normaleFront[2], normaleFront[0], normaleFront[1], normaleFront[2], // back face normaleBack[0], normaleBack[1], normaleBack[2], normaleBack[0], normaleBack[1], normaleBack[2], normaleBack[0], normaleBack[1], normaleBack[2], // left face normaleLeft[0], normaleLeft[1], normaleLeft[2], normaleLeft[0], normaleLeft[1], normaleLeft[2], normaleLeft[0], normaleLeft[1], normaleLeft[2], // right face normaleRight[0], normaleRight[1], normaleRight[2], normaleRight[0], normaleRight[1], normaleRight[2], normaleRight[0], normaleRight[1], normaleRight[2], // bottom face 0.0, -1.0, 0.0, 0.0, -1.0, 0.0, 0.0, -1.0, 0.0, 0.0, -1.0, 0.0, 0.0, -1.0, 0.0, 0.0, -1.0, 0.0, ]; var pyramidVertexIndices = [ 0, 1, 4, // Front face 2, 3, 4, // Back face 3, 0, 4, // Left face 1, 2, 4, // Right face 0, 1, 2, 2, 3, 0, // Bottom face ];

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  • Why is it so hard to find a C++ 3d game tutorial

    - by Dave
    I'm planning on learning 3d game development for the iphone using a 3d engine, but because of lack of tutorials for the iphone I was planning on using C++ game tutorials and making the necessary changes. The problem is that I've had limited success when searching for things such as 'c++ 3d fps tutorial ' I dont really get anything useful. Are there any 3d c++ tutorials you can recommend?

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  • Weird stuttering issues not related to GC.

    - by Smills
    I am getting some odd stuttering issues with my game even though my FPS never seems to drop below 30. About every 5 seconds my game stutters. I was originally getting stuttering every 1-2 seconds due to my garbage collection issues, but I have sorted those and will often go 15-20 seconds without a garbage collection. Despite this, my game still stutters periodically even when there is no GC listed in logcat anywhere near the stutter. Even when I take out most of my code and simply make my "physics" code the below code I get this weird slowdown issue. I feel that I am missing something or overlooking something. Shouldn't that "elapsed" code that I put in stop any variance in the speed of the main character related to changes in FPS? Any input/theories would be awesome. Physics: private void updatePhysics() { //get current time long now = System.currentTimeMillis(); //added this to see if I could speed it up, it made no difference Thread myThread = Thread.currentThread(); myThread.setPriority(Thread.MAX_PRIORITY); //work out elapsed time since last frame in seconds double elapsed = (now - mLastTime2) / 1000.0; mLastTime2 = now; //measures FPS and displays in logcat once every 30 frames fps+=1/elapsed; fpscount+=1; if (fpscount==30) { fps=fps/fpscount; Log.i("myActivity","FPS: "+fps+" Touch: "+touch); fpscount=0; } //this should make the main character (theoretically) move upwards at a steady pace mY-=100*elapsed; //increase amount I translate the draw to = main characters Y //location if the main character goes upwards if (mY<=viewY) { viewY=mY; } }

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  • Simulating brush strokes for painting application

    - by DrRobot
    I'm trying to write an application that can be used to create pictures that look like paintings using simulated brush strokes. Are there any good sources for simple ways of simulating brush strokes? For example, given a list of mouse positions that the user has dragged the mouse through, a brush width and a brush texture, how do I determine what to draw to the canvas? I've tried angling the brush texture in the direction of the mouse movement and dabbing several brush texture images along the path, but it doesn't look great. I think I'm missing something where the brush texture should shrink and grow on corners. Any simple to follow links would be appreciated. I've found complex academic papers on simulating e.g. oil paints but I just want a basic algorithm to use that produces OK results if possible.

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  • Resizing a GLContext in Windows

    - by user146780
    I have a Win32 window and it has a gl context. I'm trying to figure out how to resize the context because even if I use glviewport it still stays the same size as when I created the context. Am I misunderstanding glviewport? i'm providing it the bottom left corner and the size I want but its still the original size that I made the context. Thanks

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  • glDrawArrays() slow on iPad?

    - by Nick
    Hey guys, I was wondering how to speed up my iPad application using OpenGLES 2.0. At the moment we have every drawable object draw itself with a call to glDrawArrays(). Blend mode is on, we really need it. Without disabling blendmode, how would we improve performance for this app? For instances, if we now draw 1 texture across the whole screen, the app only gets 15FPS, which is really slow I think? Are we doing something terribly wrong? Our drawing code (for each drawable), is as follows: - (void) draw { GLuint textureAvailable = 0; if(texture != nil){ textureAvailable = 1; } glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, texture.name); glVertexAttribPointer(ATTRIB_VERTEX, 2, GL_FLOAT, 0, 0, vertices); glEnableVertexAttribArray(ATTRIB_VERTEX); glVertexAttribPointer(ATTRIB_COLOR, 4, GL_FLOAT, 1, 0, colorsWithMultipliedAlpha); glEnableVertexAttribArray(ATTRIB_COLOR); glVertexAttribPointer(ATTRIB_TEXTUREMAP, 2, GL_FLOAT, 1, 0, textureMapping); glEnableVertexAttribArray(ATTRIB_TEXTUREMAP); //Note that we are NOT using position.z here because that is only used to determine drawing order int *jnUniforms = JNOpenGLConstants::getInstance().uniforms; glUniform4f(jnUniforms[UNIFORM_TRANSLATE], position.x, position.y, 0.0, 0.0); glUniform4f(jnUniforms[UNIFORM_SCALE], scale.x, scale.y, 1.0, 1.0); glUniform1f(jnUniforms[UNIFORM_ROTATION], rotation); glUniform1i(jnUniforms[UNIFORM_TEXTURE_SAMPLE], 0); glUniform2f(jnUniforms[UNIFORM_TEXTURE_REPEAT], textureRepeat.x, textureRepeat.y); glUniform1i(jnUniforms[UNIFORM_TEXTURE_AVAILABLE], textureAvailable); glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); }

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  • GLSL: How to get pixel x,y,z world position?

    - by Rookie
    I want to adjust the colors depending on which xyz position they are in the world. I tried this in my fragment shader: vec4 pos = vec4(gl_FragCoord); // get pixel position but it seems that the z-coord is always towards my camera... how do i make the coords independent from my camera position/angle? Edit: if it matters, heres my vertex shader: gl_Position = ftransform(); Edit2: changed title, so i want world coords, not screen coords!

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  • The program is executing properly on dev C++ but is giving problem in Linux.The movement is becoming

    - by srinija
    #include<stdio.h> #include<GL/glut.h> GLfloat v[3][24]={{100.0,300.0,350.0,50.0,100.0,120.0,120.0,100.0,260.0,280.0, 280.0,260.0,140.0,160.0,160.0,140.0,180.0,200.0,200.0,180.0, 220.0,240.0,240.0,220.0},{100.0,100.0,200.0,200.0,160.0, 160.0,180.0,180.0,160.0,160.0,180.0,180.0,160.0,160.0,180.0, 180.0,160.0,160.0,180.0,180.0,160.0,160.0,180.0,180.0}, {1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0, 1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0}}; GLfloat v1[3][16]={{50.0,350.0,350.0,50.0,100.0,300.0,300.0,100.0,125.0,175.0, 175.0,125.0,225.0,275.0,275.0,225.0},{200.0,200.0,210.0, 210.0,210.0,210.0,240.0,240.0,240.0,240.0,310.0,310.0,240.0, 240.0,310.0,310.0},{1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0, 1.0,1.0,1.0,1.0,1.0,1.0}}; GLfloat colors[4][3]={{0.0,0.0,1.0},{0.9961,0.9961,0.65625},{1.0,0.0,1.0}, {1.0,.0,1.0}}; static float q,w,e; static float fq,fw,fe; static GLfloat wa=0,wb=0,wc=0,ba,bb,bc; int flag; void myinit(void) { glClearColor(0.506,.7,1,0.0); glPointSize(2.0); glLoadIdentity(); glOrtho(0.0,499.0,0.0,499.0,-300.0,300.0); } void draw_top_boxes(GLint i,GLint j) { glColor3f(1.0,0.0,0.0); glBegin(GL_POLYGON); glColor3fv(colors[j]); // to draw the boat glVertex2f(v1[0][i+0],v1[1][i+0]); glColor3fv(colors[j+1]); glVertex2f(v1[0][i+1],v1[1][i+1]); glColor3fv(colors[j+2]); glVertex2f(v1[0][i+2],v1[1][i+2]); glColor3fv(colors[j+3]); glVertex2f(v1[0][i+3],v1[1][i+3]); glEnd(); } void draw_polygon(GLint i) { glBegin(GL_POLYGON); // to draw the boat glColor3f(0.0,0.0,0.0); glColor3fv(colors[0]); glVertex2f(v[0][i+0],v[1][i+0]); glColor3fv(colors[1]); glVertex2f(v[0][i+1],v[1][i+1]); glColor3fv(colors[2]); glVertex2f(v[0][i+2],v[1][i+2]); glColor3fv(colors[3]); glVertex2f(v[0][i+3],v[1][i+3]); glEnd(); } void draw_boat() { draw_polygon(0); draw_polygon(4); draw_polygon(8); draw_polygon(12); draw_polygon(16); draw_polygon(20); draw_top_boxes(0,0); draw_top_boxes(4,0); draw_top_boxes(8,0); draw_top_boxes(12,0); glFlush(); glPopMatrix(); glPopMatrix(); } void draw_water() { GLfloat i; GLfloat x=0,y=103,j=0; GLfloat k; glPushMatrix(); glTranslatef(wa,wb,wc); glPushMatrix(); glColor3f(0,0,1); for(k=y;k>0;k-=6) { for(i=1;i<30;i++) { glBegin(GL_LINES); glVertex2f(j,k); glVertex2f(j+10,k); glEnd(); j=j+20; } j=0; } glPopMatrix(); glPopMatrix(); } void draw_fishes() { glPushMatrix(); glTranslatef(fq,12.0,fe); glPushMatrix(); glColor3f(.99609375,0.2578125,0.2578125); glBegin(GL_TRIANGLES); glVertex2f(100,80); glVertex2f(100,60); glVertex2f(85,70); glEnd(); glColor3f(.99609375,0.2578125,0.2578125); glBegin(GL_TRIANGLES); glVertex2f(100,70); glVertex2f(110,75); glVertex2f(110,65); glEnd(); glColor3f(0,0,0); glBegin(GL_POINTS); glVertex2f(90,71); glEnd(); glColor3f(.99609375,0.2578125,0.2578125); glBegin(GL_TRIANGLES); glVertex2f(200,80); glVertex2f(200,60); glVertex2f(185,70); glEnd(); glColor3f(.99609375,0.2578125,0.2578125); glBegin(GL_TRIANGLES); glVertex2f(200,70); glVertex2f(210,75); glVertex2f(210,65); glEnd(); glColor3f(0,0,0); glBegin(GL_POINTS); glVertex2f(190,71); glEnd(); glPopMatrix(); glPopMatrix(); glFlush(); } void draw_cloud() { GLfloat m=100,n=400,o=10; for(int i=0;i<7;i++) { glPushMatrix(); glColor3f(1.0,1.0,1.0); if(i==1) glTranslated(125,415,10); else if(i==3||i==5) glTranslated(m,n+5,o); else glTranslated(m,n,o); glutSolidSphere(20.0,5000,150); glPopMatrix(); m+=10; } } void draw_square() { glColor3f(0,0.5,0.996); glBegin(GL_POLYGON); glVertex2f(0,0); glVertex2f(1000,0); glVertex2f(0,300); glVertex2f(1000,300); glEnd(); glFlush(); } void draw_brotate() { glPushMatrix(); glColor3f(0.96,0.5,0.25); //to draw body of the bird glTranslated(300,400,10); glScalef(3,1,1); glutSolidSphere(6,50000,15); glPopMatrix(); glPushMatrix(); glTranslated(323,400,10); glutSolidSphere(5,50000,15); glPopMatrix(); glColor3f(0,0,0); glBegin(GL_POINTS); glVertex2f(325,401); glEnd(); glColor3f(0.96,0.5,0.25); //to draw wings glBegin(GL_LINES); glVertex2f(294,394); glVertex2f(286,389); glEnd(); glBegin(GL_LINES); glVertex2f(286,389); glVertex2f(295,391); glEnd(); glBegin(GL_LINES); glVertex2f(295,391); glVertex2f(285,385); glEnd(); glBegin(GL_LINES); glVertex2f(285,385); glVertex2f(309,395); glEnd(); glBegin(GL_LINES); glVertex2f(294,406); glVertex2f(286,411); glEnd(); glBegin(GL_LINES); glVertex2f(286,411); glVertex2f(295,409); glEnd(); glBegin(GL_LINES); glVertex2f(295,409); glVertex2f(285,415); glEnd(); glBegin(GL_LINES); glVertex2f(285,415); glVertex2f(309,406); glEnd(); glColor3f(0.96,0.5,0.25); } void draw_bird() { GLfloat x=200,y=400,z=10; draw_brotate(); glBegin(GL_LINES); //draw legs of the bird glVertex2f(285,402); glVertex2f(275,402); glEnd(); glBegin(GL_LINES); glVertex2f(285,398); glVertex2f(275,398); glEnd(); glBegin(GL_LINES); glVertex2f(275,402); glVertex2f(270,405); glEnd(); glBegin(GL_LINES); glVertex2f(275,402); glVertex2f(270,398); glEnd(); glBegin(GL_LINES); glVertex2f(275,398); glVertex2f(273,400); glEnd(); glBegin(GL_LINES); glVertex2f(275,398); glVertex2f(270,395); glEnd(); glBegin(GL_LINES); glVertex2f(323,405); glVertex2f(323,407); glEnd(); glPushMatrix(); glTranslatef(323,409,10); glutSolidSphere(2,200,20); glPopMatrix(); glBegin(GL_TRIANGLES); glVertex2f(328,400); glVertex2f(331,397); glVertex2f(327,398.5); glEnd(); glFlush(); } void drawstars() { glColor3f(1.0,1.0,1.0); glBegin(GL_POINTS); glVertex3f(300.0,400.0,10.0); glVertex3f(200,400.0,10.0); glVertex3f(150,450.0,10.0); glVertex3f(100,470.0,10.0); glVertex3f(50,450.0,10.0); glVertex3f(50,350.0,10.0); glVertex3f(90,365.0,10.0); glVertex3f(350,450.0,10.0); glVertex3f(275,470.0,10.0); glVertex3f(280,430.0,10.0); glVertex3f(250,400.0,10.0); glVertex3f(450,450.0,10.0); glVertex3f(430,430.0,10.0); glVertex3f(430,470.0,10.0); glVertex3f(300,450.0,10.0); glVertex3f(265,380.0,10.0); glVertex3f(235,450.0,10.0); glEnd(); } void draw_all() { glClear(GL_COLOR_BUFFER_BIT); if(flag==0) { glDisable(GL_LIGHTING); //immp one draw_square(); draw_cloud(); glClearColor(0.506,.7,1,0.0); glTranslatef(q,w,e); glPushMatrix(); glColor3f(1.0,0.0,0.0); draw_boat(); draw_fishes(); glPushMatrix(); glColor3f(1.0,1.0,0.0); glTranslated(400,400,10); glutSolidSphere(20.0,5000,150); glPopMatrix(); } if(flag==1) { glDisable(GL_LIGHTING); //imp one draw_square(); draw_cloud(); glClearColor(0.9960,0.7070,0.3164,0.0); glTranslatef(q,w,e); glPushMatrix(); glColor3f(1.0,0.0,0.0); draw_boat(); draw_fishes(); glPushMatrix(); glColor3f(1.0,1.0,0.0); glTranslated(400,400,10); glutSolidSphere(20.0,500,100); glPopMatrix(); } if(flag==2) { // just try and change values in these arrays, specially the position array drawstars(); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); // GLfloat emission[]={0.1,0.1,0.1,0.0}; GLfloat diffuse[] = { 0.40, 0.40,0.40, 1.0 }; GLfloat ambiance[] = { 0.5, 0.5,0.5, 1.0 }; GLfloat specular[] = { 1.3, 1.3,.3, 1.0 }; GLfloat intensity[]={500.0}; GLfloat position[] = { 10,30,-30,1.0 }; glLightfv (GL_LIGHT0, GL_POSITION, position); glLightfv (GL_LIGHT0, GL_DIFFUSE,diffuse); glLightfv (GL_LIGHT0, GL_AMBIENT,ambiance); glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER,GL_TRUE); glLightfv (GL_LIGHT0, GL_SPECULAR,specular); glLightfv (GL_LIGHT0, GL_INTENSITY,intensity); glColor3f(0,0.5,0.996); glBegin(GL_POLYGON); glVertex2f(0,0); glVertex2f(1000,0); glVertex2f(0,150); glVertex2f(1000,150); glEnd(); glTranslatef(q,w,e); glPushMatrix(); glColor3f(1.0,0.0,0.0); draw_boat(); draw_fishes(); glDisable(GL_LIGHTING); glDisable(GL_LIGHT0); draw_cloud(); glClearColor(0.0,0.0,0.0,0.0); glPushMatrix(); glColor3f(1.0,1.0,1.0); glTranslated(400,400,10); glutSolidSphere(20.0,500,100); glPopMatrix(); glColor3f(1.0,1.0,1.0); glBegin(GL_POINTS); glVertex3f(300.0,400.0,10.0); glEnd(); } glPushMatrix(); glTranslatef(ba,bb,bc); glPushMatrix(); draw_bird(); glPopMatrix(); glPopMatrix(); GLfloat i; glPushMatrix(); GLfloat x=0,y=100,j=0; int k; //draw_water(); Sleep(60); q+=5; fq-=3.5; if(q>=440.0) //470 q=-390.0; //400 if(fq<=-300) //500 fq=400.0; //400 wa-=1; if(wa<=(-20)) wa=-0.5; ba+=6; if(ba>=500) ba=-400; glFlush(); glutSwapBuffers(); } void display(void) { draw_all(); } void color_menu(int id) { switch(id) { case 1: flag=0;break; case 2: flag=1;break; case 3: flag=2;break; case 4: exit(0); break; } glutPostRedisplay(); } void main_menu(int id) { switch(id) { case 1: break; case 2:exit(0);break; glutPostRedisplay(); } } int main(int argc,char **argv) { int sub_menu; glutInit(&argc,argv); glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE); glutInitWindowSize(1000,1000); glutInitWindowPosition(0,0); glutCreateWindow("Ship"); sub_menu=glutCreateMenu(color_menu); glutAddMenuEntry("Morning",1); glutAddMenuEntry("Evening",2); glutAddMenuEntry("Night",3); glutAddMenuEntry("Quit",4); glutCreateMenu(main_menu); glutAddSubMenu("View",sub_menu); glutAddMenuEntry("Quit",2); glutAttachMenu(GLUT_RIGHT_BUTTON); glutDisplayFunc(display); glutIdleFunc(display); myinit(); glutMainLoop(); glFlush(); }

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