added text to sliders

README.md

@@ -6,9 +6,6 @@ Code here is published under the [AGPL-v3](https://www.gnu.org/licenses/agpl-3.0
 
 # TODO
 
-- User controlled light source
-    - Add light source
-    - move the light
-    - change intensity
 - Add popping-floating text of funny cow thoughts when in cow view
-- Add Textures and stuff :)(optional)
+- Construct the required pdf with explanations and screenshots
+- Properly comment the code :/

cow.c

@@ -1,3 +1,4 @@
+#include <GL/freeglut.h>
 #include <GL/freeglut_std.h>
 #include <GL/glut.h>
 #include <GL/gl.h>
@@ -163,10 +164,32 @@ void drawCow(char cowsPOV) {
     glScalef(0.2, 1.0, 0.2);
     glutSolidSphere(1.0, 8, 8);
     glPopMatrix(); // Tails(from sonic the hedgehog)
+    // Give the cow a little flashlight because its dark outside
+    glPushMatrix(); // fl
+    glTranslatef(0.5, -1.2, 1.4);
+    glColor3f(0.3, 0.3 ,0.3);
+    glutSolidCylinder(0.3, 2.0, 8, 1);
+    glTranslatef(0.0, 0.0, 2.0);
+    glRotatef(180.0, 0.0, 1.0, 0.0);
+    glutSolidCone(0.6, 0.6, 8, 2);
+    glEnable(GL_LIGHT0);
+    // Directional light - aka light
+    GLfloat light1[] = { 0.0, 0.0, 0.0, 1.0 };
+    GLfloat lightColor[] = {0.9, 0.9, 0.1, 1.0};
+    GLfloat dir[] = { 0.0, 0.0, -1.0 };
+    glLightfv(GL_LIGHT0, GL_POSITION, light1);
+    glLightfv(GL_LIGHT0, GL_AMBIENT, lightColor);
+    glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColor);
+    glLightfv(GL_LIGHT0, GL_SPECULAR, lightColor);
+    glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION, dir);
+    glLightf(GL_LIGHT0, GL_SPOT_CUTOFF, 30.0);
+    glLightf(GL_LIGHT0, GL_SPOT_EXPONENT, 2.0);
+    glPopMatrix(); // fl
     glPopMatrix(); // cow pos
     glColor3f(1.0, 1.0, 1.0);
     glDisable(GL_COLOR_MATERIAL);
 }
+
 void onCowKeyboardInput(char key) {
     switch(control) {
         case COW_CONTROL_MOVE:
@@ -199,6 +222,6 @@ void setCameraToCowPOV() {
     glRotatef(-headRot.y, 0.0, 1.0, 0.0);
     glTranslatef(0.0, 0.0, -5.0);
     // body
-    glTranslatef(-cowPos.x, -cowPos.y, -cowPos.z);
     glRotatef(-cowRot, 0.0, 1.0, 0.0);
+    glTranslatef(-cowPos.x, -cowPos.y, -cowPos.z);
 }

mmn_17.c

@@ -13,6 +13,9 @@
 // close enough
 #define PI 3.14
 
+// user controlled light thing
+vec3 lightPos = { 0.0, 10, 25.0 };
+
 // Camera rotation and stuff
 float camRadius = 40.0;
 vec3 camCenter = { 0.0, 0.0, 0.0 };
@@ -21,10 +24,10 @@ struct {
     unsigned char lockYMovement: 1;
     unsigned char showHelp: 1;
     unsigned char cowsPOV: 1;
+    unsigned char controlLight: 1;
     GLenum textureFilter;
-    
 } settings = {
-    0, 0, 0, GL_NEAREST, 
+    0, 0, 0, 0, GL_NEAREST, 
 };
 struct {
     int main;
@@ -40,22 +43,21 @@ struct {
 int lastMouseButton = GLUT_LEFT_BUTTON;
 int lastMouseX = 0, lastMouseY = 0;
 ui_slider* draggedSlider = NULL;
-ui_button buttons[] = {}; // TODO: maybe delete? the menu thing is easier to work with
 ui_slider sliders[] = {
     { // ambient red
         /* pos */ { { 0.9, 0.9, 0.0 }, { -50.0, -10.0, 0.0 } },
         /* size */ { 100.0, 10.0, 10.0 },
-        0.0
+        0.1
     },
     { // ambient green
         /* pos */ { { 0.9, 0.9, 0.0 }, { -50.0, -40.0, 0.0 } },
         /* size */ { 100.0, 10.0, 10.0 },
-        0.0
+        0.1
     },
     { // ambient blue
         /* pos */ { { 0.9, 0.9, 0.0 }, { -50.0, -70.0, 0.0 } },
         /* size */ { 100.0, 10.0, 10.0 },
-        0.3
+        0.1
     },
     { // drag speed
         /* pos */ { { 0.9, 0.9, 0.0 }, { -50.0, -120.0, 0.0 } },
@@ -66,7 +68,60 @@ ui_slider sliders[] = {
         /* pos */ { { 0.9, 0.9, 0.0 }, { -50.0, -170.0, 0.0 } },
         /* size */ { 100.0, 10.0, 10.0 },
         0.3
-    }
+    },
+    { // user light - red
+        /* pos */ { { 0., 0.9, 0.0 }, { 20.0, -10.0, 0.0 } },
+        /* size */ { 100.0, 10.0, 10.0 },
+        0.0
+    },
+    { // user light - green
+        /* pos */ { { 0.0, 0.9, 0.0 }, { 20.0, -40.0, 0.0 } },
+        /* size */ { 100.0, 10.0, 10.0 },
+        0.0
+    },
+    { // user light - blue
+        /* pos */ { { 0.0, 0.9, 0.0 }, { 20.0, -70.0, 0.0 } },
+        /* size */ { 100.0, 10.0, 10.0 },
+        1.0
+    },
+    { // user light - movement step
+        /* pos */ { { 0.0, 0.9, 0.0 }, { 20.0, -100.0, 0.0 } },
+        /* size */ { 100.0, 10.0, 10.0 },
+        0.2
+    },
+    { // user light - constant attenuation
+        /* pos */ { { 0.0, 0.9, 0.0 }, { 20.0, -130.0, 0.0 } },
+        /* size */ { 100.0, 10.0, 10.0 },
+        0.0
+    },
+    { // user light - linear attenuation
+        /* pos */ { { 0.0, 0.9, 0.0 }, { 20.0, -160.0, 0.0 } },
+        /* size */ { 100.0, 10.0, 10.0 },
+        0.0
+    },
+    { // user light - cubic attenuation
+        /* pos */ { { 0.0, 0.9, 0.0 }, { 20.0, -190.0, 0.0 } },
+        /* size */ { 100.0, 10.0, 10.0 },
+        0.5
+    },
+};
+// sliders named, struct to give sliders a name, they are stored in an array to ease handling them
+struct {
+    ui_slider* ambientRed;
+    ui_slider* ambientGreen;
+    ui_slider* ambientBlue;
+    ui_slider* dragSpeed;
+    ui_slider* rotSpeed;
+    ui_slider* lightRed;
+    ui_slider* lightGreen;
+    ui_slider* lightBlue;
+    ui_slider* lightMove;
+    ui_slider* lightConAtten;
+    ui_slider* lightLinAtten;
+    ui_slider* lightQuadAtten;
+} slidersN = {
+    sliders, sliders + 1, sliders + 2, sliders + 3, sliders + 4, sliders + 5, sliders + 6, 
+    sliders + 7, sliders + 8, sliders + 9, sliders + 10, sliders + 11
 };
 
 void generateGrassVertexList() {
@@ -153,10 +208,6 @@ void drawUi(void) {
     glLoadIdentity();
     gluOrtho2D(0.0, wWidth, 0.0, wHeight);
     
-    // Draw buttons
-    for(ui_button* b = buttons; b < buttons + sizeof buttons / sizeof(ui_button); b += 1) {
-        ui_button_draw(b);
-    }
     for(ui_slider* s = sliders; s < sliders + sizeof sliders / sizeof(ui_slider); s += 1) {
         ui_slider_draw(s);
     }
@@ -173,7 +224,14 @@ void drawUi(void) {
     glutBitmapString(GLUT_BITMAP_TIMES_ROMAN_24, td);
     glRasterPos2f(wWidth * 0.9 - glutBitmapLength(GLUT_BITMAP_TIMES_ROMAN_24, tr) * 0.5, wHeight * 0.9 - 150.0);
     glutBitmapString(GLUT_BITMAP_TIMES_ROMAN_24, tr);
-    
+    // light sliders
+    unsigned char t2[] = "Light orb";
+    unsigned char side[] = "r\ng\nb\nSpeed\nConstant Atten\nLinear Atten\nQuadraic Atten";
+    glRasterPos2f(10.0, wHeight * 0.9 + 20.0);
+    glutBitmapString(GLUT_BITMAP_TIMES_ROMAN_24, t2);
+    glRasterPos2f(140.0, wHeight * 0.9 - 10.0);
+    glutBitmapString(GLUT_BITMAP_TIMES_ROMAN_24, side);
+
     if(settings.showHelp) {
         glColor3f(0.3, 0.3, 0.3);
         glBegin(GL_QUADS);
@@ -219,16 +277,32 @@ void drawWorld(void) {
     glEnable(GL_LIGHTING);
     glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
     // Ambient light
-    GLfloat ambient[] = { sliders[0].value, sliders[1].value, sliders[2].value, 1.0 };
+    GLfloat ambient[] = { slidersN.ambientRed->value, slidersN.ambientGreen->value, slidersN.ambientBlue->value, 1.0 };
     glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
-    glEnable(GL_LIGHT0);
-    // Directional light - aka light
-    GLfloat light1[] = { 0.0, 1.0, 0.0, 0.0 };
-    glLightfv(GL_LIGHT0, GL_POSITION, light1);
-    GLfloat lightColor[] = {0.5, 0.4, 0.1, 1.0};
-    glLightfv(GL_LIGHT0, GL_AMBIENT, lightColor);
-    glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColor);
-    glLightfv(GL_LIGHT0, GL_SPECULAR, lightColor);
+    // GL_LIGHT0 is reserved for the cow's flashlight
+    // user light
+    glEnable(GL_LIGHT1);
+    GLfloat ulPos[] = { lightPos.x, lightPos.y, lightPos.z, 1.0 };
+    GLfloat ulColor[] = { slidersN.lightRed->value, slidersN.lightGreen->value, slidersN.lightBlue->value, 1.0 };
+    glLightfv(GL_LIGHT1, GL_POSITION, ulPos);
+    glLightfv(GL_LIGHT1, GL_AMBIENT, ulColor);
+    glLightfv(GL_LIGHT1, GL_DIFFUSE, ulColor);
+    glLightfv(GL_LIGHT1, GL_SPECULAR, ulColor);
+    glLightf(GL_LIGHT1, GL_CONSTANT_ATTENUATION, slidersN.lightConAtten->value * 5.0 + 0.01);
+    glLightf(GL_LIGHT1, GL_LINEAR_ATTENUATION, slidersN.lightLinAtten->value * 0.3);
+    glLightf(GL_LIGHT1, GL_QUADRATIC_ATTENUATION, slidersN.lightQuadAtten->value * 0.01);
+    // draw a little glowing orb where it stands
+    glMatrixMode(GL_MODELVIEW);
+    glPushMatrix();
+    glTranslatef(lightPos.x, lightPos.y, lightPos.z);
+    glEnable(GL_COLOR_MATERIAL);
+    glColor3f(1.0, 1.0, 1.0);
+    glMaterialfv(GL_FRONT, GL_EMISSION, ulColor);
+    glutSolidSphere(1.0, 8, 8);
+    GLfloat reset[] = { 0.0, 0.0, 0.0, 1.0 };
+    glMaterialfv(GL_FRONT, GL_EMISSION, reset);
+    glDisable(GL_COLOR_MATERIAL);
+    glPopMatrix();
     // World
     drawCow(settings.cowsPOV);
     // Ground
@@ -291,11 +365,7 @@ void mouseEvent(int button, int state, int x, int y) {
     lastMouseX = x; lastMouseY = y;
     if(state == 0) lastMouseButton = button;
     if(state == 0 && button == GLUT_LEFT_BUTTON) {
-        for(ui_button* b = buttons; b < buttons + sizeof buttons / sizeof(ui_button); b += 1) {
-            if(ui_button_mouse_over(b, x, y) && b->onClick != NULL) {
-                b->clicked = 1;
-            }
-        }
+
         for(ui_slider* s = sliders; s < sliders + sizeof sliders / sizeof(ui_slider); s += 1) {
             if(ui_slider_mouse_over(s, x, y)) {
                 ui_slider_onclick(s, x, y);
@@ -305,12 +375,6 @@ void mouseEvent(int button, int state, int x, int y) {
     }
     else if(state == 1 && button == GLUT_LEFT_BUTTON) {
         draggedSlider = NULL;
-        for(ui_button* b = buttons; b < buttons + sizeof buttons / sizeof(ui_button); b += 1) {
-            b->clicked = 0;
-            if(ui_button_mouse_over(b, x, y) && b->onClick != NULL) {
-                b->onClick();
-            }
-        }
     }
     glutPostRedisplay();
 }
@@ -324,7 +388,7 @@ void mouseMotionEvent(int x, int y) {
         }
         else {
             // rotate the camera
-            float speed = sliders[4].value * 0.095 + 0.005;
+            float speed = slidersN.rotSpeed->value * 0.095 + 0.005;
             camRot.y -= (x - lastMouseX) * speed;
             if(camRot.y > 2 * PI) camRot.y -= 2 * PI;
             else if(camRot.y < 0.0) camRot.y += 2 * PI;
@@ -341,7 +405,7 @@ void mouseMotionEvent(int x, int y) {
             moveX.y = 0;
             moveY.y = 0;
         }
-        float speed = sliders[3].value * 0.9 + 0.1;
+        float speed = slidersN.dragSpeed->value * 0.9 + 0.1;
         camCenter = vec3_add(camCenter, vec3_mult(moveX, (lastMouseX - x) * speed));
         camCenter = vec3_add(camCenter, vec3_mult(moveY, (y - lastMouseY) * speed));
     }
@@ -377,6 +441,16 @@ void keyboardEvent(unsigned char c, int x, int y) {
         }
     }
     onCowKeyboardInput(c);
+    // Move light source if applicable
+    if(settings.controlLight) {
+        // Controls: wasd - movement over xz plane, qe movement over y axle
+        // color and such shall be controlled using the sliders
+        float step = slidersN.lightMove->value * 9.0 + 1.0; // go from 1 to 10;
+        lightPos.x += ((c == 'd') - (c == 'a')) * step;
+        lightPos.y += ((c == 'q') - (c == 'e')) * step;
+        lightPos.z += ((c == 'w') - (c == 's')) * step;
+        glutPostRedisplay();
+    }
 }
 
 void onMenuItem(int item) {
@@ -403,11 +477,16 @@ void onMenuItem(int item) {
         case 4: // quit
             glutLeaveMainLoop();
             exit(0);
+        case 5: // control light source
+            updateCowControl(COW_CONTROL_NONE);
+            settings.controlLight = 1;
+            
     }
 }
 
 void onControlCowMenu(int item) {
     lastMouseButton = GLUT_RIGHT_BUTTON;
+    settings.controlLight = 0;
     updateCowControl(item);
 }
 
@@ -434,6 +513,7 @@ void menuSetup() {
     glutAddMenuEntry("Lock Y position", 0);
     glutAddMenuEntry("Change to Cow POV", 1);
     glutAddMenuEntry("Reset view", 3);
+    glutAddMenuEntry("Control point light", 5);
     glutAddMenuEntry("Help", 2);
     glutAddMenuEntry("Quit", 4);
     glutAttachMenu(GLUT_RIGHT_BUTTON);
@@ -443,7 +523,7 @@ int main(int argc, char** argv) {
     /* initialize glut and window */
     glutInit(&argc, argv);
     glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
-    glutInitWindowSize(800, 500);
+    glutInitWindowSize(1280, 720);
     glutInitWindowPosition(450, 450);
     /* create window and set callbacks */
     glutCreateWindow("World of Cow - Aviv Romem");

ui.c

@@ -7,53 +7,6 @@
 #include <stdio.h>
 
 #define BACK_COLOR 0.3, 0.35, 0.35
-#define BACK_CLICKED_COLOR 0.25, 0.3, 0.3
-
-void ui_button_draw(ui_button* b) {
-    int wWidth = glutGet(GLUT_WINDOW_WIDTH);
-    int wHeight = glutGet(GLUT_WINDOW_HEIGHT);
-    
-    vec3 pos = vec3_add(b->position.absolute, vec3_new(b->position.relative.x * wWidth, b->position.relative.y * wHeight, 0.0));
-    vec3 ext = b->size;
-    glColorVec(b->clicked ? vec3_new(BACK_CLICKED_COLOR) : vec3_new(BACK_COLOR));
-    glBegin(GL_QUADS);
-        glVertexVec(pos);
-        glVertex3f(pos.x + ext.x, pos.y, pos.z);
-        glVertexVec(vec3_add(pos, ext));
-        glVertex3f(pos.x, pos.y + ext.y, pos.z);
-    glEnd();
-    glColor3f(0.7, 0.7, 0.8);
-    glLineWidth(2.0);
-    glBegin(GL_LINE_LOOP);
-        glVertexVec(pos);
-        glVertex3f(pos.x + ext.x, pos.y, pos.z);
-        glVertexVec(vec3_add(pos, ext));
-        glVertex3f(pos.x, pos.y + ext.y, pos.z);
-    glEnd();
-    // Draw text if needed
-    if(b->text != NULL) {
-        glColor3f(1.0, 1.0, 1.0);
-        // Get text size
-        int textWidth = glutBitmapLength(GLUT_BITMAP_TIMES_ROMAN_24, (unsigned char*)b->text);
-        int textHeight = glutBitmapHeight(GLUT_BITMAP_TIMES_ROMAN_24);
-        // set raster position - not gonna take into account multiple line text buttons
-        vec3 rPos = vec3_add(pos, vec3_mult(ext, 0.5));
-        rPos.x -= textWidth * 0.5;
-        rPos.y -= textHeight * 0.25;
-        glRasterPos3f(rPos.x, rPos.y, rPos.z);
-        glutBitmapString(GLUT_BITMAP_TIMES_ROMAN_24, (unsigned char*)b->text);
-    }
-}
-
-char ui_button_mouse_over(ui_button* b, int mouseX, int mouseY) {
-    int wWidth = glutGet(GLUT_WINDOW_WIDTH);
-    int wHeight = glutGet(GLUT_WINDOW_HEIGHT);
-    
-    vec3 pos = vec3_add(b->position.absolute, vec3_new(b->position.relative.x * wWidth, b->position.relative.y * wHeight, 0.0));
-    vec3 ext = b->size;
-    vec3 m = vec3_sub(vec3_new(mouseX, wHeight - mouseY, 0.0), pos);
-    return m.x > 0.0 && m.x < ext.x && m.y > 0.0 && m.y < ext.y;
-}
 
 void ui_slider_draw(ui_slider* s) {
     int wWidth = glutGet(GLUT_WINDOW_WIDTH);

ui.h

@@ -7,15 +7,6 @@ typedef struct _ui_position {
     vec3 absolute;
 } ui_pos;
 
-typedef struct _ui_button {
-    ui_pos position;
-    /* x,y - width,height, z - unused */
-    vec3 size; // size in pixels - if screen is too small i am not sure if it is a smart idea to make everything smaller
-    void (*onClick)(); // instead of passing stuff in, im just gonna put every state variable in global scope to ensure everything lives...
-    char* text;
-    char clicked;
-} ui_button;
-
 typedef struct _ui_slider {
     ui_pos position;
     /* x - width, y - height, z - middle circle radius */
@@ -23,9 +14,6 @@ typedef struct _ui_slider {
     float value; // Value will always range between 0 and 1
 } ui_slider;
 
-void ui_button_draw(ui_button* b);
-char ui_button_mouse_over(ui_button* b, int mouseX, int mouseY);
-
 void ui_slider_draw(ui_slider* s);
 char ui_slider_mouse_over(ui_slider* s, int mouseX, int mouseY);
 void ui_slider_onclick(ui_slider* s, int mouseX, int mouseY);