user controlled light
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60024859bf
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2fe1b677b7
GPG key ID:
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3 changed files with 113 additions and 92 deletions
146
mmn_17.c
146
mmn_17.c
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@ -13,6 +13,9 @@
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// close enough
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#define PI 3.14
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// user controlled light thing
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vec3 lightPos = { 0.0, 0.0, 0.0 };
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// Camera rotation and stuff
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float camRadius = 40.0;
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vec3 camCenter = { 0.0, 0.0, 0.0 };
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@ -21,10 +24,10 @@ struct {
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unsigned char lockYMovement: 1;
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unsigned char showHelp: 1;
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unsigned char cowsPOV: 1;
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unsigned char controlLight: 1;
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GLenum textureFilter;
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} settings = {
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0, 0, 0, GL_NEAREST,
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0, 0, 0, 0, GL_NEAREST,
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};
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struct {
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int main;
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@ -40,22 +43,21 @@ struct {
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int lastMouseButton = GLUT_LEFT_BUTTON;
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int lastMouseX = 0, lastMouseY = 0;
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ui_slider* draggedSlider = NULL;
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ui_button buttons[] = {}; // TODO: maybe delete? the menu thing is easier to work with
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ui_slider sliders[] = {
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{ // ambient red
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/* pos */ { { 0.9, 0.9, 0.0 }, { -50.0, -10.0, 0.0 } },
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/* size */ { 100.0, 10.0, 10.0 },
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0.0
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0.1
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},
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{ // ambient green
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/* pos */ { { 0.9, 0.9, 0.0 }, { -50.0, -40.0, 0.0 } },
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/* size */ { 100.0, 10.0, 10.0 },
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0.0
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0.1
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},
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{ // ambient blue
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/* pos */ { { 0.9, 0.9, 0.0 }, { -50.0, -70.0, 0.0 } },
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/* size */ { 100.0, 10.0, 10.0 },
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0.3
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0.1
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},
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{ // drag speed
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/* pos */ { { 0.9, 0.9, 0.0 }, { -50.0, -120.0, 0.0 } },
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@ -66,7 +68,60 @@ ui_slider sliders[] = {
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/* pos */ { { 0.9, 0.9, 0.0 }, { -50.0, -170.0, 0.0 } },
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/* size */ { 100.0, 10.0, 10.0 },
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0.3
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}
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},
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{ // user light - red
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/* pos */ { { 0.1, 0.9, 0.0 }, { 0.0, -10.0, 0.0 } },
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/* size */ { 100.0, 10.0, 10.0 },
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0.0
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},
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{ // user light - green
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/* pos */ { { 0.1, 0.9, 0.0 }, { 0.0, -40.0, 0.0 } },
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/* size */ { 100.0, 10.0, 10.0 },
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0.0
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},
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{ // user light - blue
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/* pos */ { { 0.1, 0.9, 0.0 }, { 0.0, -70.0, 0.0 } },
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/* size */ { 100.0, 10.0, 10.0 },
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0.0
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},
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{ // user light - movement step
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/* pos */ { { 0.1, 0.9, 0.0 }, { 0.0, -100.0, 0.0 } },
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/* size */ { 100.0, 10.0, 10.0 },
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0.2
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},
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{ // user light - constant attenuation
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/* pos */ { { 0.1, 0.9, 0.0 }, { 0.0, -130.0, 0.0 } },
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/* size */ { 100.0, 10.0, 10.0 },
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0.0
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},
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{ // user light - linear attenuation
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/* pos */ { { 0.1, 0.9, 0.0 }, { 0.0, -160.0, 0.0 } },
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/* size */ { 100.0, 10.0, 10.0 },
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0.0
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},
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{ // user light - cubic attenuation
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/* pos */ { { 0.1, 0.9, 0.0 }, { 0.0, -190.0, 0.0 } },
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/* size */ { 100.0, 10.0, 10.0 },
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0.0
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},
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};
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// sliders named, struct to give sliders a name, they are stored in an array to ease handling them
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struct {
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ui_slider* ambientRed;
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ui_slider* ambientGreen;
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ui_slider* ambientBlue;
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ui_slider* dragSpeed;
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ui_slider* rotSpeed;
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ui_slider* lightRed;
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ui_slider* lightGreen;
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ui_slider* lightBlue;
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ui_slider* lightMove;
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ui_slider* lightConAtten;
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ui_slider* lightLinAtten;
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ui_slider* lightQuadAtten;
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} slidersN = {
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sliders, sliders + 1, sliders + 2, sliders + 3, sliders + 4, sliders + 5, sliders + 6,
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sliders + 7, sliders + 8, sliders + 9, sliders + 10, sliders + 11
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};
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void generateGrassVertexList() {
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@ -153,10 +208,6 @@ void drawUi(void) {
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glLoadIdentity();
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gluOrtho2D(0.0, wWidth, 0.0, wHeight);
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// Draw buttons
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for(ui_button* b = buttons; b < buttons + sizeof buttons / sizeof(ui_button); b += 1) {
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ui_button_draw(b);
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}
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for(ui_slider* s = sliders; s < sliders + sizeof sliders / sizeof(ui_slider); s += 1) {
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ui_slider_draw(s);
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}
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@ -219,16 +270,39 @@ void drawWorld(void) {
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glEnable(GL_LIGHTING);
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glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
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// Ambient light
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GLfloat ambient[] = { sliders[0].value, sliders[1].value, sliders[2].value, 1.0 };
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GLfloat ambient[] = { slidersN.ambientRed->value, slidersN.ambientGreen->value, slidersN.ambientBlue->value, 1.0 };
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glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
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glEnable(GL_LIGHT0);
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// Directional light - aka light
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GLfloat light1[] = { 0.0, 1.0, 0.0, 0.0 };
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glLightfv(GL_LIGHT0, GL_POSITION, light1);
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GLfloat lightColor[] = {0.5, 0.4, 0.1, 1.0};
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glLightfv(GL_LIGHT0, GL_AMBIENT, lightColor);
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glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColor);
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glLightfv(GL_LIGHT0, GL_SPECULAR, lightColor);
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// glEnable(GL_LIGHT0);
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// // Directional light - aka light
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// GLfloat light1[] = { 0.0, 1.0, 0.0, 0.0 };
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// glLightfv(GL_LIGHT0, GL_POSITION, light1);
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// GLfloat lightColor[] = {0.5, 0.4, 0.1, 1.0};
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// glLightfv(GL_LIGHT0, GL_AMBIENT, lightColor);
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// glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColor);
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// glLightfv(GL_LIGHT0, GL_SPECULAR, lightColor);
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// user light
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glEnable(GL_LIGHT1);
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GLfloat ulPos[] = { lightPos.x, lightPos.y, lightPos.z, 1.0 };
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GLfloat ulColor[] = { slidersN.lightRed->value, slidersN.lightGreen->value, slidersN.lightBlue->value, 1.0 };
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glLightfv(GL_LIGHT1, GL_POSITION, ulPos);
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glLightfv(GL_LIGHT1, GL_AMBIENT, ulColor);
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glLightfv(GL_LIGHT1, GL_DIFFUSE, ulColor);
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glLightfv(GL_LIGHT1, GL_SPECULAR, ulColor);
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glLightf(GL_LIGHT1, GL_CONSTANT_ATTENUATION, slidersN.lightConAtten->value * 10.0 + 0.01);
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glLightf(GL_LIGHT1, GL_LINEAR_ATTENUATION, slidersN.lightLinAtten->value * 0.5);
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glLightf(GL_LIGHT1, GL_QUADRATIC_ATTENUATION, slidersN.lightQuadAtten->value * 0.5);
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// draw a little glowing orb where it stands
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glMatrixMode(GL_MODELVIEW);
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glPushMatrix();
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glTranslatef(lightPos.x, lightPos.y, lightPos.z);
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glEnable(GL_COLOR_MATERIAL);
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glColor3f(1.0, 1.0, 1.0);
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glMaterialfv(GL_FRONT, GL_EMISSION, ulColor);
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glutSolidSphere(1.0, 8, 8);
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GLfloat reset[] = { 0.0, 0.0, 0.0, 1.0 };
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glMaterialfv(GL_FRONT, GL_EMISSION, reset);
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glDisable(GL_COLOR_MATERIAL);
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glPopMatrix();
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// World
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drawCow(settings.cowsPOV);
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// Ground
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@ -291,11 +365,7 @@ void mouseEvent(int button, int state, int x, int y) {
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lastMouseX = x; lastMouseY = y;
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if(state == 0) lastMouseButton = button;
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if(state == 0 && button == GLUT_LEFT_BUTTON) {
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for(ui_button* b = buttons; b < buttons + sizeof buttons / sizeof(ui_button); b += 1) {
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if(ui_button_mouse_over(b, x, y) && b->onClick != NULL) {
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b->clicked = 1;
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}
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}
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for(ui_slider* s = sliders; s < sliders + sizeof sliders / sizeof(ui_slider); s += 1) {
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if(ui_slider_mouse_over(s, x, y)) {
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ui_slider_onclick(s, x, y);
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@ -305,12 +375,6 @@ void mouseEvent(int button, int state, int x, int y) {
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}
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else if(state == 1 && button == GLUT_LEFT_BUTTON) {
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draggedSlider = NULL;
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for(ui_button* b = buttons; b < buttons + sizeof buttons / sizeof(ui_button); b += 1) {
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b->clicked = 0;
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if(ui_button_mouse_over(b, x, y) && b->onClick != NULL) {
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b->onClick();
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}
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}
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}
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glutPostRedisplay();
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}
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@ -324,7 +388,7 @@ void mouseMotionEvent(int x, int y) {
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}
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else {
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// rotate the camera
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float speed = sliders[4].value * 0.095 + 0.005;
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float speed = slidersN.rotSpeed->value * 0.095 + 0.005;
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camRot.y -= (x - lastMouseX) * speed;
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if(camRot.y > 2 * PI) camRot.y -= 2 * PI;
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else if(camRot.y < 0.0) camRot.y += 2 * PI;
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@ -341,7 +405,7 @@ void mouseMotionEvent(int x, int y) {
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moveX.y = 0;
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moveY.y = 0;
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}
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float speed = sliders[3].value * 0.9 + 0.1;
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float speed = slidersN.dragSpeed->value * 0.9 + 0.1;
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camCenter = vec3_add(camCenter, vec3_mult(moveX, (lastMouseX - x) * speed));
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camCenter = vec3_add(camCenter, vec3_mult(moveY, (y - lastMouseY) * speed));
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}
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@ -377,6 +441,16 @@ void keyboardEvent(unsigned char c, int x, int y) {
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}
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}
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onCowKeyboardInput(c);
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// Move light source if applicable
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if(settings.controlLight) {
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// Controls: wasd - movement over xz plane, qe movement over y axle
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// color and such shall be controlled using the sliders
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float step = slidersN.lightMove->value * 9.0 + 1.0; // go from 1 to 10;
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lightPos.x += ((c == 'd') - (c == 'a')) * step;
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lightPos.y += ((c == 'q') - (c == 'e')) * step;
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lightPos.z += ((c == 'w') - (c == 's')) * step;
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glutPostRedisplay();
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}
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}
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void onMenuItem(int item) {
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@ -403,11 +477,16 @@ void onMenuItem(int item) {
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case 4: // quit
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glutLeaveMainLoop();
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exit(0);
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case 5: // control light source
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updateCowControl(COW_CONTROL_NONE);
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settings.controlLight = 1;
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}
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}
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void onControlCowMenu(int item) {
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lastMouseButton = GLUT_RIGHT_BUTTON;
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settings.controlLight = 0;
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updateCowControl(item);
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}
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@ -434,6 +513,7 @@ void menuSetup() {
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glutAddMenuEntry("Lock Y position", 0);
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glutAddMenuEntry("Change to Cow POV", 1);
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glutAddMenuEntry("Reset view", 3);
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glutAddMenuEntry("Control point light", 5);
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glutAddMenuEntry("Help", 2);
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glutAddMenuEntry("Quit", 4);
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glutAttachMenu(GLUT_RIGHT_BUTTON);
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47
ui.c
47
ui.c
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@ -7,53 +7,6 @@
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#include <stdio.h>
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#define BACK_COLOR 0.3, 0.35, 0.35
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#define BACK_CLICKED_COLOR 0.25, 0.3, 0.3
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void ui_button_draw(ui_button* b) {
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int wWidth = glutGet(GLUT_WINDOW_WIDTH);
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int wHeight = glutGet(GLUT_WINDOW_HEIGHT);
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vec3 pos = vec3_add(b->position.absolute, vec3_new(b->position.relative.x * wWidth, b->position.relative.y * wHeight, 0.0));
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vec3 ext = b->size;
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glColorVec(b->clicked ? vec3_new(BACK_CLICKED_COLOR) : vec3_new(BACK_COLOR));
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glBegin(GL_QUADS);
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glVertexVec(pos);
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glVertex3f(pos.x + ext.x, pos.y, pos.z);
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glVertexVec(vec3_add(pos, ext));
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glVertex3f(pos.x, pos.y + ext.y, pos.z);
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glEnd();
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glColor3f(0.7, 0.7, 0.8);
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glLineWidth(2.0);
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glBegin(GL_LINE_LOOP);
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glVertexVec(pos);
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glVertex3f(pos.x + ext.x, pos.y, pos.z);
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glVertexVec(vec3_add(pos, ext));
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glVertex3f(pos.x, pos.y + ext.y, pos.z);
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glEnd();
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// Draw text if needed
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if(b->text != NULL) {
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glColor3f(1.0, 1.0, 1.0);
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// Get text size
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int textWidth = glutBitmapLength(GLUT_BITMAP_TIMES_ROMAN_24, (unsigned char*)b->text);
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int textHeight = glutBitmapHeight(GLUT_BITMAP_TIMES_ROMAN_24);
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// set raster position - not gonna take into account multiple line text buttons
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vec3 rPos = vec3_add(pos, vec3_mult(ext, 0.5));
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rPos.x -= textWidth * 0.5;
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rPos.y -= textHeight * 0.25;
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glRasterPos3f(rPos.x, rPos.y, rPos.z);
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glutBitmapString(GLUT_BITMAP_TIMES_ROMAN_24, (unsigned char*)b->text);
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}
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}
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char ui_button_mouse_over(ui_button* b, int mouseX, int mouseY) {
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int wWidth = glutGet(GLUT_WINDOW_WIDTH);
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int wHeight = glutGet(GLUT_WINDOW_HEIGHT);
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vec3 pos = vec3_add(b->position.absolute, vec3_new(b->position.relative.x * wWidth, b->position.relative.y * wHeight, 0.0));
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vec3 ext = b->size;
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vec3 m = vec3_sub(vec3_new(mouseX, wHeight - mouseY, 0.0), pos);
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return m.x > 0.0 && m.x < ext.x && m.y > 0.0 && m.y < ext.y;
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}
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void ui_slider_draw(ui_slider* s) {
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int wWidth = glutGet(GLUT_WINDOW_WIDTH);
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12
ui.h
12
ui.h
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@ -7,15 +7,6 @@ typedef struct _ui_position {
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vec3 absolute;
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} ui_pos;
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typedef struct _ui_button {
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ui_pos position;
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/* x,y - width,height, z - unused */
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vec3 size; // size in pixels - if screen is too small i am not sure if it is a smart idea to make everything smaller
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void (*onClick)(); // instead of passing stuff in, im just gonna put every state variable in global scope to ensure everything lives...
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char* text;
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char clicked;
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} ui_button;
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typedef struct _ui_slider {
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ui_pos position;
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/* x - width, y - height, z - middle circle radius */
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@ -23,9 +14,6 @@ typedef struct _ui_slider {
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float value; // Value will always range between 0 and 1
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} ui_slider;
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void ui_button_draw(ui_button* b);
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char ui_button_mouse_over(ui_button* b, int mouseX, int mouseY);
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void ui_slider_draw(ui_slider* s);
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char ui_slider_mouse_over(ui_slider* s, int mouseX, int mouseY);
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void ui_slider_onclick(ui_slider* s, int mouseX, int mouseY);
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