UW Extension Certificate Program in Game Development 2 nd quarter: Advanced Graphics

UW ExtensionCertificate Program inGame Development 2nd quarter:Advanced Graphics 2D Rendering

Goals • Learn the basic states used in 2D rendering • See how to render 2D images on the screen • Review the fixed function pixel pipeline

D3D Calls

Typical global configuration • Disable Z-buffering and stencil • SetRenderState(D3DRS_ZENABLE, D3DZB_FALSE); • SetRenderState(D3DRS_ZWRITEENABLE, FALSE); • SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE); • Disable pixel shader (will use the texture stage states) • SetPixelShader(NULL); • Normal shading and no culling • SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE);

Typical global configuration (cont.) • Enable alpha-blending • SetRenderState(D3DRS_SEPARATEALPHABLENDENABLE, FALSE); • SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE); • SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA); • SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA); • SetRenderState(D3DRS_BLENDOP, D3DBLENDOP_ADD); • Disable alpha-testing • SetRenderState(D3DRS_ALPHATESTENABLE, FALSE);

Basic primitive: the rectangle • Create the vertices • Vertex const vertices[4] = { • { 20, 20, 0, 1, … }, • { 100, 20, 0, 1, … }, • { 20, 100, 0, 1, … }, • { 100, 100, 0, 1, … }, }; • Set up the vertex format (must match the data!) • SetFVF(D3DFVF_XYZRHW | …); • And render • DrawPrimitiveUP(D3DPT_TRIANGLESTRIP, 2, vertices, sizeof(vertices[0]));

Textures • Select the texture image: • SetTexture(0, pTexture); • Select the sampling settings: • SetSamplerState(0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR); • SetSamplerState(0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR); • SetSamplerState(0, D3DSAMP_MIPFILTER, D3DTEXF_LINEAR); • SetSamplerState(0, D3DSAMP_ADDRESSU, D3DADDRESS_CLAMP); • SetSamplerState(0, D3DSAMP_ADDRESSV, D3DADDRESS_CLAMP);

Texture calculations • Perform custom calculations for every pixel. For instance: • SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_MODULATE); • SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE); • SetTextureStageState(0, D3DTSS_COLORARG2, D3DTA_CURRENT); • SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_SELECTARG1); • SetTextureStageState(0, D3DTSS_ALPHAARG1, D3DTA_CURRENT); • SetTextureStageState(0, D3DTSS_TEXCOORDINDEX, 0); • Disable the first one that’s not needed • SetTextureStageState(1, D3DTSS_COLOROP, D3DTOP_DISABLE); • SetTextureStageState(1, D3DTSS_ALPHAOP, D3DTOP_DISABLE);

UW Extension Certificate Program in Game Development 2 nd quarter: Advanced Graphics