Add Music fluctuations project and Chinese plan docs

MVS/Music fluctuations/source/image/image.cpp

@@ -0,0 +1,56 @@
+#define STB_IMAGE_IMPLEMENTATION
+#include"stb_image.h"
+#include "image.h"
+
+Image::Image(const int& width, const int& height, RGBA* data) {
+	m_width = width;
+	m_height = height;
+	if (data) {
+		m_data = new RGBA[m_width * m_height];
+		memcpy(m_data, data, sizeof(RGBA) * m_width * m_height);
+	}
+}
+
+Image::~Image() {
+	if (m_data != nullptr) {
+		delete[] m_data;
+	}
+}
+
+//仅接收（-1，1）的参数
+RGBA Image::GetColor(const float& p_u, const float& p_v)
+{
+	if (!m_data) { return RGBA(255,255,255,255); }
+	/*此处注意截断误差，不要直接算index，一定要让x和y分别截断一下*/
+	int x = fmod(p_u + 1, 1.f) * m_width;
+	int y = fmod(p_v + 1, 1.f) * m_height;
+	return m_data[x + y * m_width];
+}
+
+Image* Image::CreateImage(const std::string& path) {
+	int picType = 0;
+	int width{ 0 }, height{ 0 };
+
+	stbi_set_flip_vertically_on_load(true);
+
+	unsigned char* bits = stbi_load(path.c_str(), &width, &height, &picType, STBI_rgb_alpha);
+	for (int i = 0; i < width * height * 4; i += 4)
+	{
+		BYTE tmp = bits[i];
+		bits[i] = bits[i + 2];
+		bits[i + 2] = tmp;
+	}
+
+	Image* image = new Image(width, height, (RGBA*)bits);
+
+	stbi_image_free(bits);
+
+	return image;
+
+}
+
+void Image::DestroyImage(Image* image) {
+	if (image) {
+		delete image;
+	}
+}