OpenGL

开发平台：
Visual C++

render_dx9.cpp：源码内容
							#include "Gut.h"
#include "render_data.h"
#include <d3dx9.h>
#include <d3dx9math.h>
bool InitResourceDX9(void)
{
	// 获得Direct3D 9设备
	LPDIRECT3DDEVICE9 device = GutGetGraphicsDeviceDX9();
	// 设置视角转换矩阵
	Matrix4x4 projection_matrix = GutMatrixPerspectiveRH_DirectX(90.0f, 1.0f, 0.1f, 100.0f);
	device->SetTransform(D3DTS_PROJECTION, (D3DMATRIX *) &projection_matrix);
	// 关闭光照
	device->SetRenderState(D3DRS_LIGHTING, FALSE);
	// 改变三角形正面的法线
	device->SetRenderState(D3DRS_CULLMODE, D3DCULL_CW);
	return true;
}
bool ReleaseResourceDX9(void)
{
	return true;
}
void ResizeWindowDX9(int width, int height)
{
	// 获得Direct3D 9设备
	LPDIRECT3DDEVICE9 device = GutGetGraphicsDeviceDX9();
	D3DPRESENT_PARAMETERS d3dpresent;
    
	ZeroMemory( &d3dpresent, sizeof(d3dpresent) );
    d3dpresent.Windowed = TRUE; // 使用窗口模式
    d3dpresent.SwapEffect = D3DSWAPEFFECT_DISCARD;
    d3dpresent.BackBufferFormat = D3DFMT_UNKNOWN; // 使用窗口模式可以不去设置
	d3dpresent.BackBufferCount = 1; // 提供一块backbuffer
	d3dpresent.EnableAutoDepthStencil = TRUE; // 自动打开DepthStencil Buffer
	d3dpresent.AutoDepthStencilFormat = D3DFMT_D24S8; // DepthStencil Buffer模式
	
	device->Reset(&d3dpresent);
	// 投影矩阵, 重设水平和垂直方向的视角.
	float aspect = (float) height / (float) width;
	Matrix4x4 projection_matrix = GutMatrixPerspectiveRH_DirectX(90.0f, aspect, 0.1f, 100.0f);
	device->SetTransform(D3DTS_PROJECTION, (D3DMATRIX *) &projection_matrix);
	// 关闭光照
	device->SetRenderState(D3DRS_LIGHTING, FALSE);
	// 改变三角形正面的法线
	device->SetRenderState(D3DRS_CULLMODE, D3DCULL_CW);
}
// 使用DirectX 9来绘图
void RenderFrameDX9(void)
{
	LPDIRECT3DDEVICE9 device = GutGetGraphicsDeviceDX9();
	// `清除画面`
	device->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, D3DCOLOR_ARGB(0, 0, 0, 0), 1.0f, 0);
	// `开始下绘图指令`
	device->BeginScene(); 
	// `计算出一个可以转换到镜头坐标系的矩阵`
	Matrix4x4 view_matrix = GutMatrixLookAtRH(g_eye, g_lookat, g_up);
	device->SetTransform(D3DTS_VIEW, (D3DMATRIX *) &view_matrix);
	// `设置数据格式`
	// D3DFVF_XYZ = `使用3个浮点数来记录位置`
	// D3DFVF_DIFFUSE = `使用32bits整数类型来记录BGRA颜色`
	device->SetFVF(D3DFVF_XYZ|D3DFVF_DIFFUSE); 
	D3DXMATRIX temp_matrix;
	// `太阳, 代入鼠标的旋转控制`
	D3DXMATRIX sun_matrix, sun_ry, sun_rx;
	D3DXMatrixRotationX(&sun_rx, g_fRotate_X);		
	D3DXMatrixRotationY(&sun_ry, g_fRotate_Y);		
	D3DXMatrixMultiply(&sun_matrix, &sun_ry, &sun_rx);
	device->SetTransform(D3DTS_WORLD, (D3DMATRIX *) &sun_matrix);
	device->DrawIndexedPrimitiveUP(D3DPT_TRIANGLELIST, 0, g_iNumSphereVertices, g_iNumSphereTriangles, 
		g_pSphereIndices, D3DFMT_INDEX16, g_pSunVertices, sizeof(Vertex_VC) );
	// `水星`
	float mercury_rotate_y = 2.0f * MATH_PI * (g_simulation_days / days_a_year_mercury); 
	D3DXMATRIX mercury_matrix, mercury_translate, mercury_rotate;
	D3DXMatrixRotationY(&mercury_rotate, mercury_rotate_y);
	D3DXMatrixTranslation(&mercury_translate, mercury_to_sun_distance, 0.0f, 0.0f);
	D3DXMatrixMultiply(&temp_matrix, &mercury_translate, &mercury_rotate);
	D3DXMatrixMultiply(&mercury_matrix, &temp_matrix, &sun_matrix);
	device->SetTransform(D3DTS_WORLD, (D3DMATRIX *) &mercury_matrix);
	device->DrawIndexedPrimitiveUP(D3DPT_TRIANGLELIST, 0, g_iNumSphereVertices, g_iNumSphereTriangles, g_pSphereIndices, D3DFMT_INDEX16, g_pMoonVertices, sizeof(Vertex_VC) );
	// `金星`
	float venus_rotate_y = 2.0f * MATH_PI * (g_simulation_days / days_a_year_venus); 
	D3DXMATRIX venus_matrix, venus_rotate, venus_translate;
	D3DXMatrixRotationY(&venus_rotate, venus_rotate_y);
	D3DXMatrixTranslation(&venus_translate, venus_to_sun_distance, 0.0f, 0.0f);
	D3DXMatrixMultiply(&temp_matrix, &venus_translate, &venus_rotate);
	D3DXMatrixMultiply(&venus_matrix, &temp_matrix, &sun_matrix);
	device->SetTransform(D3DTS_WORLD, (D3DMATRIX *) &venus_matrix);
	device->DrawIndexedPrimitiveUP(D3DPT_TRIANGLELIST, 0, g_iNumSphereVertices, g_iNumSphereTriangles, g_pSphereIndices, D3DFMT_INDEX16, g_pMoonVertices, sizeof(Vertex_VC) );
	// `地球`
	float earth_rotate_y = 2.0f * MATH_PI * (g_simulation_days / days_a_year); 
	D3DXMATRIX earth_matrix, earth_rotate, earth_translate;
	D3DXMatrixRotationY(&earth_rotate, earth_rotate_y);
	D3DXMatrixTranslation(&earth_translate, earth_to_sun_distance, 0.0f, 0.0f);
	D3DXMatrixMultiply(&temp_matrix, &earth_translate, &earth_rotate);
	D3DXMatrixMultiply(&earth_matrix, &temp_matrix, &sun_matrix);
	device->SetTransform(D3DTS_WORLD, (D3DMATRIX *) &earth_matrix);
	device->DrawIndexedPrimitiveUP(D3DPT_TRIANGLELIST, 0, g_iNumSphereVertices, g_iNumSphereTriangles, g_pSphereIndices, D3DFMT_INDEX16, g_pEarthVertices, sizeof(Vertex_VC) );
	
	// `月亮`
	float moon_rotate_y = 2.0f * MATH_PI * (g_simulation_days / days_a_month); 
	D3DXMATRIX moon_matrix, moon_rotate, moon_translate;
	D3DXMatrixRotationY(&moon_rotate, moon_rotate_y);
	D3DXMatrixTranslation(&moon_translate, moon_to_earth_distance, 0.0f, 0.0f);
	D3DXMatrixMultiply(&temp_matrix, &moon_translate, &moon_rotate);
	D3DXMatrixMultiply(&moon_matrix, &temp_matrix, &earth_matrix);
	device->SetTransform(D3DTS_WORLD, (D3DMATRIX *) &moon_matrix);
	device->DrawIndexedPrimitiveUP(D3DPT_TRIANGLELIST, 0, g_iNumSphereVertices, g_iNumSphereTriangles, g_pSphereIndices, D3DFMT_INDEX16, g_pMoonVertices, sizeof(Vertex_VC) );
	// `声明所有的绘图指令都下完了`
	device->EndScene(); 
	
	// `把背景backbuffer的画面显示出来`
    device->Present( NULL, NULL, NULL, NULL );
}

						