Miku texture

src/psychadelic-graphics/app.ts

@@ -1,14 +1,40 @@
 import psychadelicColors from './psychadelicColors.frag.glsl';
-
+import mikuImageUrl from './Hatsune-Miku-vocaloids-30622078-935-1023.jpg';
 
 const canvas = document.getElementById('canvas') as HTMLCanvasElement;
 const gl = canvas.getContext('webgl2')!;
 
-// Basic vertex shader (just passes coordinates)
+// Load Miku texture
+const mikuTexture = gl.createTexture();
+// Create a single pixel as initial texture to avoid errors before image loads
+gl.bindTexture(gl.TEXTURE_2D, mikuTexture);
+gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, new Uint8Array([255, 0, 255, 255]));
+
+const mikuImage = new Image();
+mikuImage.src = mikuImageUrl;
+
+mikuImage.onload = () => {
+    console.log('Miku image loaded successfully');
+    gl.bindTexture(gl.TEXTURE_2D, mikuTexture);
+    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, mikuImage);
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
+};
+
+mikuImage.onerror = (err) => {
+    console.error('Failed to load Miku image:', err);
+};
+
+// Basic vertex shader (just passes coordinates and texture coordinates)
 const vertexShaderSource = `#version 300 es
 in vec4 a_position;
+out vec2 v_texCoord;
 void main() {
     gl_Position = a_position;
+    // Convert position from clip space (-1 to +1) to texture coordinates (0 to 1)
+    v_texCoord = a_position.xy * -0.5 + 0.5;
 }`;
 
 // Compile shader
@@ -58,6 +84,7 @@ gl.vertexAttribPointer(positionAttributeLocation, 2, gl.FLOAT, false, 0, 0);
 const timeUniformLocation = gl.getUniformLocation(program, 'u_time');
 const canvasWidthLocation = gl.getUniformLocation(program, 'u_canvasWidth');
 const canvasHeightLocation = gl.getUniformLocation(program, 'u_canvasHeight');
+const mikuTextureLocation = gl.getUniformLocation(program, 'u_mikuTexture');
 
 // Set up resize handler
 function resize() {
@@ -72,8 +99,13 @@ resize();
 function draw(time: number) {
     gl.useProgram(program);
     gl.uniform1f(timeUniformLocation, time * 0.001); // Convert to seconds
-    gl.uniform1f(canvasWidthLocation, canvas.width); // Convert to seconds
+    gl.uniform1f(canvasWidthLocation, canvas.width);
-    gl.uniform1f(canvasHeightLocation, canvas.height); // Convert to seconds
+    gl.uniform1f(canvasHeightLocation, canvas.height);
+
+    // Bind Miku texture to texture unit 0
+    gl.activeTexture(gl.TEXTURE0);
+    gl.bindTexture(gl.TEXTURE_2D, mikuTexture);
+    gl.uniform1i(mikuTextureLocation, 0);
 
     gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
     requestAnimationFrame(draw);

src/psychadelic-graphics/psychadelicColors.frag.glsl

@@ -2,11 +2,11 @@
 precision highp float;
 
 uniform float u_time;
-
 uniform float u_canvasWidth;
 uniform float u_canvasHeight;
+uniform sampler2D u_mikuTexture;
 
-
+in vec2 v_texCoord;
 out vec4 fragColor;
 
 // See https://thebookofshaders.com/10/
@@ -34,7 +34,7 @@ vec2 pixellate(vec2 inputVec, float size) {
     );
 }
 
-void pixelatedSinWave() {
+vec4 pixelatedSinWave() {
     vec2 uv = gl_FragCoord.xy/vec2(u_canvasWidth, u_canvasHeight);
 
     float amount = 1.0/(u_time * 9.0);
@@ -45,17 +45,30 @@ void pixelatedSinWave() {
     float dist = distance(uv, vec2(0.5, 0.5));
     float curve = sin(dist * 60.0);
     vec4 outputColor = vec4(0.5, 0.1, curve, 1.0);
+    return outputColor;
 
     float size = 0.01;
     float period = 1.0;
 
     fragColor = boxFade(outputColor, size, period);
- 
 }
 
+vec4 miku() {
+    // Get base texture color
+    vec2 uv = v_texCoord;
+
+    // Sample the texture first without effects
+    vec4 texColor = texture(u_mikuTexture, uv);
+
+    return texColor;
+}
 
 void main() {
 
-    pixelatedSinWave();
+    vec4 texColor = miku();
 
+    // Apply box fade effect
+    float boxSize = 0.02;
+    float period = 2.0;
+    fragColor = boxFade(texColor, boxSize, period);
 }