Add files

src/graphics/graphics-library/helper/load-uniform.ts

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+import { mat3, ReadonlyVec3, vec2, vec3 } from 'gl-matrix';
+
+const loaderMat3 = mat3.create();
+
+export const loadUniform = (
+  gl: WebGL2RenderingContext,
+  value: any,
+  type: GLenum,
+  location: WebGLUniformLocation
+): any => {
+  const converters: Map<
+    GLenum,
+    (gl: WebGL2RenderingContext, value: any, location: WebGLUniformLocation) => void
+  > = new Map();
+  {
+    converters.set(WebGL2RenderingContext.FLOAT, (gl, v, l) => {
+      if (v instanceof Array) {
+        if (v.length == 0) {
+          return;
+        }
+
+        gl.uniform1fv(l, new Float32Array(v));
+      } else {
+        gl.uniform1f(l, v);
+      }
+    });
+
+    converters.set(WebGL2RenderingContext.FLOAT_VEC2, (gl, v: vec2 | Array<vec2>, l) => {
+      if (v.length == 0) {
+        return;
+      }
+
+      if (v[0] instanceof Array) {
+        const result = new Float32Array(v.length * 2);
+
+        for (let i = 0; i < v.length; i++) {
+          result[2 * i] = (v[i] as Array<number>).x;
+          result[2 * i + 1] = (v[i] as Array<number>).y;
+        }
+
+        gl.uniform2fv(l, result);
+      } else {
+        gl.uniform2fv(l, v as vec2);
+      }
+    });
+
+    converters.set(
+      WebGL2RenderingContext.FLOAT_VEC3,
+      (gl, v: ReadonlyVec3 | Array<vec3>, l) => {
+        if (v.length == 0) {
+          return;
+        }
+
+        if (v[0] instanceof Array) {
+          const result = new Float32Array(v.length * 3);
+
+          for (let i = 0; i < v.length; i++) {
+            result[3 * i] = (v[i] as Array<number>)[0];
+            result[3 * i + 1] = (v[i] as Array<number>)[1];
+            result[3 * i + 2] = (v[i] as Array<number>)[2];
+          }
+
+          gl.uniform3fv(l, result);
+        } else {
+          gl.uniform3fv(l, v as vec3);
+        }
+      }
+    );
+
+    converters.set(WebGL2RenderingContext.FLOAT_MAT3, (gl, v, l) => {
+      gl.uniformMatrix3fv(l, true, mat3.fromMat2d(loaderMat3, v));
+    });
+
+    converters.set(WebGL2RenderingContext.BOOL, (gl, v, l) => gl.uniform1i(l, v));
+
+    if (!converters.has(type)) {
+      throw new Error(`Unimplemented webgl type: ${type}`);
+    }
+
+    converters.get(type)!(gl, value, location);
+  }
+};