隨風擺動——GLSL Shader

大家看過了Bashcraft後 (未看第二集的按此)

係咪好想知道片中點解D草同樹葉會擺動呢

其實當中用了GLSL mod

我在此亦都曾經提及過

只不過mod的原創者已不再更新

所以要到另外的地方下載

首先到Dax Wikia 下載mod(下圖)

注意: 裝了modloader的請下載下面那個(glsl_unofficial_1.7.3_ml.zip)

下載後開啟壓縮檔

並把所有檔案複制到minecraft.jar(用解壓程式開啟)中

(如果已用MCPatcher啟用了HD Texture的話可以跳過這一部)

在此下載MCPatcher

運行下載了的.exe
選"HD Textures"(下圖)
然後按Patch (程式會自動為你Backup舊檔)

回到glsl mod的壓縮檔
把裡面的/Shaders Folder解壓並開啟
會見到下圖的視窗

(DoF即景深, Depth of  View)

因為glsl mod本身並不設草的擺動

所以我們需要修改少少Code!

先開啟base.vsh

用notepad的話用走樣

我個人就較鐘意用notepad++

找到以下字句

並在 tex==15 || 後 加上 tex == 39 || tex == 56 || tex == 63 || tex == 79

應該會變成以下這樣:

if ((tex == 12 || tex == 13  || tex == 15 || tex == 39 || tex == 56 || tex == 63 || tex == 79)&& renderType == 1)  {
        float t = float(mod(worldTime, 500))/500.0;
        vec2 pos = position.xz/16.0;
        if (round(16.0*gl_MultiTexCoord0.t) <= floor(16.0*gl_MultiTexCoord0.t)) {
            position.x -= (sin(PI2*(2.0*pos.x + pos.y - 3.0*t)) + 0.6)/8.0;
        }
    }
#endif

加了的字句

其實係叫該函數

(其實實質不是函數, 不過...都差不多啦)

把texture id(下圖)為39, 56, 63 及79都擺動

完成後儲存檔案

並連同其他Shader檔案

(.DS Store, base.fsh, base.vsh, final.fsh)

複制到minecraft.jar中的/Shaders 中

(不想要景深的可把final.fsh刪除)

完成啦!

如果不想要樹葉擺動的話

(我覺得好食資源)

可以把WAVING_LEAVES 刪除

整個檔案變成這樣:

#define CURVATURE
#define WAVING_WHEAT
#define WAVING_PLANTS


#ifdef CURVATURE
const float FLAT_RADIUS          = 84.0;
const float WORLD_RADIUS         = 212.0;
const float WORLD_RADIUS_SQUARED = WORLD_RADIUS*WORLD_RADIUS;
#endif

const float PI = 3.1415926535897932384626433832795;
const float PI2 = 6.283185307179586476925286766559;

uniform float sunVector;
uniform float moonVector;
uniform int worldTime;
uniform int renderType;

varying float texID;

int getTextureID(vec2 coord);

void main() {
    vec4 position = gl_Vertex;
#ifdef WAVING_WHEAT
    int tex = getTextureID(gl_MultiTexCoord0.st);
    if (87 < tex && tex < 96 && renderType != 0) {
        float t = float(mod(worldTime, 200))/200.0;
        vec2 pos = position.xz/16.0;
        if (round(16.0*gl_MultiTexCoord0.t) <= floor(16.0*gl_MultiTexCoord0.t)) {
            position.x += (sin(PI2*(2.0*pos.x + pos.y - 3.0*t)) + 0.6)/20.0;
        }
    }
    position = gl_ModelViewMatrix * position;
#endif
#ifdef CURVATURE
    if (gl_Color.a != 0.8) {
        // Not a cloud.

        float dist = (length(position) - FLAT_RADIUS)/WORLD_RADIUS;

        if (dist > 0) {
            dist *= dist;
            position.y -= WORLD_RADIUS - sqrt(max(1.0 - dist, 0.0)) * WORLD_RADIUS;
        }

    }
#endif
#ifdef WAVING_PLANTS
if ((tex == 12 || tex == 13  || tex == 15 || tex == 39 || tex == 56 || tex == 63 || tex == 79)&& renderType == 1)  {
        float t = float(mod(worldTime, 500))/500.0;
        vec2 pos = position.xz/16.0;
        if (round(16.0*gl_MultiTexCoord0.t) <= floor(16.0*gl_MultiTexCoord0.t)) {
            position.x -= (sin(PI2*(2.0*pos.x + pos.y - 3.0*t)) + 0.6)/8.0;
        }
    }
#endif


#if defined(CURVATURE) || defined(WAVING_WHEAT) || defined(WAVING_PLANTS)
    gl_Position = gl_ProjectionMatrix * position;
#else
    gl_Position = ftransform();
#endif

    if (renderType != 0) {
        texID = float(getTextureID(gl_MultiTexCoord0.st));
    }
    else {
        texID = -1.0;
    }

    gl_FrontColor = gl_BackColor = gl_Color;
    gl_TexCoord[0] = gl_MultiTexCoord0;
    gl_FogFragCoord = gl_Position.z;
}

int getTextureID(vec2 coord) {
    int i = int(floor(16*coord.s));
    int j = int(floor(16*coord.t));
    return i + 16*j;
}

如果大家仲想玩多D

仲有waving water同waving lava

可用Minecraft4kids 的Shaders

不過我覺得好食RAM