WebGLMorphTargets: Add flag for opt-out data texture.

Author: Mugen87

src/renderers/webgl/WebGLCapabilities.js

@@ -87,6 +87,8 @@ function WebGLCapabilities( gl, extensions, parameters ) {
 
 	const maxSamples = isWebGL2 ? gl.getParameter( gl.MAX_SAMPLES ) : 0;
 
+	const morphTargetTexture = isWebGL2 && parameters.disableMorphTargetTexture !== true;
+
 	return {
 
 		isWebGL2: isWebGL2,
@@ -113,7 +115,9 @@ function WebGLCapabilities( gl, extensions, parameters ) {
 		floatFragmentTextures: floatFragmentTextures,
 		floatVertexTextures: floatVertexTextures,
 
-		maxSamples: maxSamples
+		maxSamples: maxSamples,
+
+		morphTargetTexture: morphTargetTexture
 
 	};
 

src/renderers/webgl/WebGLMorphtargets.js

@@ -33,7 +33,7 @@ function WebGLMorphtargets( gl, capabilities, textures ) {
 
 		const objectInfluences = object.morphTargetInfluences;
 
-		if ( capabilities.isWebGL2 ) {
+		if ( capabilities.morphTargetTexture === true ) {
 
 			// instead of using attributes, the WebGL 2 code path encodes morph targets
 			// into an array of data textures. Each layer represents a single morph target.

src/renderers/webgl/WebGLProgram.js

@@ -487,8 +487,8 @@ function WebGLProgram( renderer, cacheKey, parameters, bindingStates ) {
 
 			parameters.morphTargets ? '#define USE_MORPHTARGETS' : '',
 			parameters.morphNormals && parameters.flatShading === false ? '#define USE_MORPHNORMALS' : '',
-			( parameters.morphTargets && parameters.isWebGL2 ) ? '#define MORPHTARGETS_TEXTURE' : '',
-			( parameters.morphTargets && parameters.isWebGL2 ) ? '#define MORPHTARGETS_COUNT ' + parameters.morphTargetsCount : '',
+			( parameters.morphTargets && parameters.useMorphTargetTexture ) ? '#define MORPHTARGETS_TEXTURE' : '',
+			( parameters.morphTargets && parameters.useMorphTargetTexture ) ? '#define MORPHTARGETS_COUNT ' + parameters.morphTargetsCount : '',
 			parameters.doubleSided ? '#define DOUBLE_SIDED' : '',
 			parameters.flipSided ? '#define FLIP_SIDED' : '',
 

src/renderers/webgl/WebGLPrograms.js

@@ -12,6 +12,7 @@ function WebGLPrograms( renderer, cubemaps, cubeuvmaps, extensions, capabilities
 	const floatVertexTextures = capabilities.floatVertexTextures;
 	const maxVertexUniforms = capabilities.maxVertexUniforms;
 	const vertexTextures = capabilities.vertexTextures;
+	const morphTargetTexture = capabilities.morphTargetTexture;
 
 	let precision = capabilities.precision;
 
@@ -234,6 +235,7 @@ function WebGLPrograms( renderer, cubemaps, cubeuvmaps, extensions, capabilities
 			morphTargets: !! object.geometry && !! object.geometry.morphAttributes.position,
 			morphNormals: !! object.geometry && !! object.geometry.morphAttributes.normal,
 			morphTargetsCount: ( !! object.geometry && !! object.geometry.morphAttributes.position ) ? object.geometry.morphAttributes.position.length : 0,
+			useMorphTargetTexture: morphTargetTexture,
 
 			numDirLights: lights.directional.length,
 			numPointLights: lights.point.length,