skel.onResize = function() {
// resize.
gl.viewport(0, 0, gl.viewportWidth, gl.viewportHeight);
gl.matrixMode(gl.PROJECTION);
gl.loadIdentity();
glu.perspective(45, gl.viewportWidth / gl.viewportHeight, 0.1, 100.0);
gl.matrixMode(gl.MODELVIEW);
gl.loadIdentity();
}
skel.onDrawScene = function() {
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer
gl.bindTexture(gl.TEXTURE_2D, texture[0]);
for (var loop=0;loop<STAR_NUM;loop++) {
gl.loadIdentity();
gl.translatef(0.0, 0.0,zoom);
gl.rotatef(tilt, 1.0, 0.0, 0.0);
gl.rotatef(star[loop].angle,0.0, 1.0,0.0);
gl.translatef(star[loop].dist, 0.0, 0.0);
gl.rotatef(-star[loop].dist,0.0,1.0,0.0);
gl.rotatef(-tilt, 1.0,0.0,0.0);
if (twinkle) {
console.log(STAR_NUM-loop);
console.log(loop);
console.log(STAR_NUM);
gl.color4ub(star[STAR_NUM-loop-1].r, star[STAR_NUM-loop-1].g, star[STAR_NUM-loop-1].b, 255);
gl.begin(gl.QUADS);
gl.texCoords2f(0.0,0.0); gl.vertex3f(-1.0, -1.0,0.0);
gl.texCoords2f(1.0,0.0); gl.vertex3f( 1.0, -1.0,0.0);
gl.texCoords2f(1.0,1.0); gl.vertex3f( 1.0, 1.0,0.0);
gl.texCoords2f(0.0,1.0); gl.vertex3f(-1.0, 1.0,0.0);
gl.end();
}
gl.rotatef(spin, 0.0, 0.0, 1.0);
gl.color4ub(star[loop].r, star[loop].g, star[loop].b,255);
gl.begin(gl.QUADS); // Begin Drawing The Textured Quad
gl.texCoord2f(0.0, 0.0); gl.vertex3f(-1.0,-1.0, 0.0);
gl.texCoord2f(1.0, 0.0); gl.vertex3f( 1.0,-1.0, 0.0);
gl.texCoord2f(1.0, 1.0); gl.vertex3f( 1.0, 1.0, 0.0);
gl.texCoord2f(0.0, 1.0); gl.vertex3f(-1.0, 1.0, 0.0);
gl.end(); // Done Drawing The Textured Quad
spin +=0.01; // used to spin the stars.
star[loop].angle += loop * 1.0 / STAR_NUM * 1.0; // change star angle.
star[loop].dist -= 0.01; // bring back to center.
if (star[loop].dist<0.0) { // star hit the center
star[loop].dist += 5.0; // move 5 units from the center.
star[loop].r = Math.round(Math.random() *256); // new red color.
star[loop].g = Math.round(Math.random() * 256); // new green color.
star[loop].b = Math.round(Math.random() * 256); // new blue color.
}
}
requestAnimationFrame(skel.onDrawScene);
}
skel.onInitScene = function() {
// init.
loadTextures();
gl.enable(gl.TEXTURE_2D);
gl.clearColor(0.0, 0.0, 0.0, 0.5);
gl.clearDepth(1.0);
gl.shadeModel(gl.SMOOTH);
gl.matrixMode(gl.PROJECTION);
gl.loadIdentity();
glu.perspective(45, gl.viewportWidth / gl.viewportHeight, 0.1, 100.0);
gl.matrixMode(gl.MODELVIEW);
gl.blendFunc(gl.SRC_ALPHA,gl.ONE);
gl.enable(gl.BLEND);
for (loop=0;loop<50;loop++) {
star[loop]= {
angle: 0.0,
dist: loop*1.0/STAR_NUM*5.0,
r: Math.round(Math.random()*256),
g: Math.round(Math.random()*256),
b: Math.round(Math.random()*256)
};
}
}
skel.onDrawScene = function() {
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer
gl.loadIdentity(); // Reset The View
gl.translatef(0.0, 0.0, -5.0);
gl.translatef(x, y, z);
gl.rotatef(xrot, 1.0, 0.0, 0.0);
gl.rotatef(yrot, 0.0, 1.0, 0.0);
gl.rotatef(zrot, 0.0, 0.0, 1.0);
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.begin(gl.QUADS);
// Front Face
gl.texCoord2f(0.0, 0.0);
gl.vertex3f(-1.0, -1.0, 1.0);
gl.texCoord2f(1.0, 0.0);
gl.vertex3f(1.0, -1.0, 1.0);
gl.texCoord2f(1.0, 1.0);
gl.vertex3f(1.0, 1.0, 1.0);
gl.texCoord2f(0.0, 1.0);
gl.vertex3f(-1.0, 1.0, 1.0);
// Back Face
gl.texCoord2f(1.0, 0.0);
gl.vertex3f(-1.0, -1.0, -1.0);
gl.texCoord2f(1.0, 1.0);
gl.vertex3f(-1.0, 1.0, -1.0);
gl.texCoord2f(0.0, 1.0);
gl.vertex3f(1.0, 1.0, -1.0);
gl.texCoord2f(0.0, 0.0);
gl.vertex3f(1.0, -1.0, -1.0);
// Top Face
gl.texCoord2f(0.0, 1.0);
gl.vertex3f(-1.0, 1.0, -1.0);
gl.texCoord2f(0.0, 0.0);
gl.vertex3f(-1.0, 1.0, 1.0);
gl.texCoord2f(1.0, 0.0);
gl.vertex3f(1.0, 1.0, 1.0);
gl.texCoord2f(1.0, 1.0);
gl.vertex3f(1.0, 1.0, -1.0);
// Bottom Face
gl.texCoord2f(1.0, 1.0);
gl.vertex3f(-1.0, -1.0, -1.0);
gl.texCoord2f(0.0, 1.0);
gl.vertex3f(1.0, -1.0, -1.0);
gl.texCoord2f(0.0, 0.0);
gl.vertex3f(1.0, -1.0, 1.0);
gl.texCoord2f(1.0, 0.0);
gl.vertex3f(-1.0, -1.0, 1.0);
// Right face
gl.texCoord2f(1.0, 0.0);
gl.vertex3f(1.0, -1.0, -1.0);
gl.texCoord2f(1.0, 1.0);
gl.vertex3f(1.0, 1.0, -1.0);
gl.texCoord2f(0.0, 1.0);
gl.vertex3f(1.0, 1.0, 1.0);
gl.texCoord2f(0.0, 0.0);
gl.vertex3f(1.0, -1.0, 1.0);
// Left Face
gl.texCoord2f(0.0, 0.0);
gl.vertex3f(-1.0, -1.0, -1.0);
gl.texCoord2f(1.0, 0.0);
gl.vertex3f(-1.0, -1.0, 1.0);
gl.texCoord2f(1.0, 1.0);
gl.vertex3f(-1.0, 1.0, 1.0);
gl.texCoord2f(0.0, 1.0);
gl.vertex3f(-1.0, 1.0, -1.0);
gl.end();
if (rotate) {
xrot += 0.3;
yrot += 0.2;
zrot += 0.4;
}
requestAnimationFrame(skel.onDrawScene);
}
skel.onDrawScene = function() {
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer
gl.loadIdentity(); // Reset The Modelview Matrix
gl.translatef(0.0, 0.0, -2.0); // Move Into The Screen 5 Units
gl.bindTexture(gl.TEXTURE_2D, texture[0]); // Select Our Logo Texture
gl.begin(gl.QUADS); // Start Drawing A Textured Quad
gl.texCoord2f(0.0, -roll + 0.0);
gl.vertex3f(-1.1, -1.1, 0.0); // Bottom Left
gl.texCoord2f(3.0, -roll + 0.0);
gl.vertex3f(1.1, -1.1, 0.0); // Bottom Right
gl.texCoord2f(3.0, -roll + 3.0);
gl.vertex3f(1.1, 1.1, 0.0); // Top Right
gl.texCoord2f(0.0, -roll + 3.0);
gl.vertex3f(-1.1, 1.1, 0.0); // Top Left
gl.end(); // Done Drawing The Quad
gl.enable(gl.BLEND); // Enable Blending
gl.disable(gl.DEPTH_TEST); // Disable Depth Testing
if (masking) // Is Masking Enabled?
{
gl.blendFunc(gl.DST_COLOR, gl.ZERO); // Blend Screen Color With Zero (Black)
}
if (scene) // Are We Drawing The Second Scene?
{
gl.translatef(0.0, 0.0, -1.0); // Translate Into The Screen One Unit
gl.rotatef(roll * 360, 0.0, 0.0, 1.0); // Rotate On The Z Axis 360 Degrees.
if (masking) // Is Masking On?
{
gl.bindTexture(gl.TEXTURE_2D, texture[3]); // Select The Second Mask Texture
gl.begin(gl.QUADS); // Start Drawing A Textured Quad
gl.texCoord2f(0.0, 0.0);
gl.vertex3f(-1.1, -1.1, 0.0); // Bottom Left
gl.texCoord2f(1.0, 0.0);
gl.vertex3f(1.1, -1.1, 0.0); // Bottom Right
gl.texCoord2f(1.0, 1.0);
gl.vertex3f(1.1, 1.1, 0.0); // Top Right
gl.texCoord2f(0.0, 1.0);
gl.vertex3f(-1.1, 1.1, 0.0); // Top Left
gl.end(); // Done Drawing The Quad
}
gl.blendFunc(gl.ONE, gl.ONE); // Copy Image 2 Color To The Screen
gl.bindTexture(gl.TEXTURE_2D, texture[4]); // Select The Second Image Texture
gl.begin(gl.QUADS); // Start Drawing A Textured Quad
gl.texCoord2f(0.0, 0.0);
gl.vertex3f(-1.1, -1.1, 0.0); // Bottom Left
gl.texCoord2f(1.0, 0.0);
gl.vertex3f(1.1, -1.1, 0.0); // Bottom Right
gl.texCoord2f(1.0, 1.0);
gl.vertex3f(1.1, 1.1, 0.0); // Top Right
gl.texCoord2f(0.0, 1.0);
gl.vertex3f(-1.1, 1.1, 0.0); // Top Left
gl.end(); // Done Drawing The Quad
} else // Otherwise
{
if (masking) // Is Masking On?
{
gl.bindTexture(gl.TEXTURE_2D, texture[1]); // Select The First Mask Texture
gl.begin(gl.QUADS); // Start Drawing A Textured Quad
gl.texCoord2f(roll + 0.0, 0.0);
gl.vertex3f(-1.1, -1.1, 0.0); // Bottom Left
gl.texCoord2f(roll + 4.0, 0.0);
gl.vertex3f(1.1, -1.1, 0.0); // Bottom Right
gl.texCoord2f(roll + 4.0, 4.0);
gl.vertex3f(1.1, 1.1, 0.0); // Top Right
gl.texCoord2f(roll + 0.0, 4.0);
gl.vertex3f(-1.1, 1.1, 0.0); // Top Left
gl.end(); // Done Drawing The Quad
}
gl.blendFunc(gl.ONE, gl.ONE); // Copy Image 1 Color To The Screen
gl.bindTexture(gl.TEXTURE_2D, texture[2]); // Select The First Image Texture
gl.begin(gl.QUADS); // Start Drawing A Textured Quad
gl.texCoord2f(roll + 0.0, 0.0);
gl.vertex3f(-1.1, -1.1, 0.0); // Bottom Left
gl.texCoord2f(roll + 4.0, 0.0);
gl.vertex3f(1.1, -1.1, 0.0); // Bottom Right
gl.texCoord2f(roll + 4.0, 4.0);
gl.vertex3f(1.1, 1.1, 0.0); // Top Right
gl.texCoord2f(roll + 0.0, 4.0);
gl.vertex3f(-1.1, 1.1, 0.0); // Top Left
gl.end(); // Done Drawing The Quad
}
gl.enable(gl.DEPTH_TEST); // Enable Depth Testing
gl.disable(gl.BLEND); // Disable Blending
roll += 0.002; // Increase Our Texture Roll Variable
if (roll > 1.0) // Is Roll Greater Than One
{
roll -= 1.0; // Subtract 1 From Roll
}
requestAnimationFrame(skel.onDrawScene);
}